Distortion probing reference signal configuration

ABSTRACT

Methods, systems, and devices for wireless communications are described. A configuration for a reference signal used to determine a non-linear behavior of transmission components at a transmitting device may be determined. The configuration for the reference signal may be determined based on signaling transmitted by the transmitting device, signaling transmitted by a device that receives the reference signal, or both. Additionally, or alternatively, the configuration for the reference signal may be determined based on a configuration of other signals transmitted by the transmitting device prior to or concurrently with the transmission of the reference signal. The determined configuration may be used to generate and transmit the reference signal or to determine a configuration of a received reference signal. In both cases, a non-linear response of transmission components at the transmitting device may be determined based on the reference signal.

CROSS REFERENCE

The present Application for Patent is a continuation of U.S. patentapplication Ser. No. 17/387,248 by Ly et al., entitled “DISTORTIONPROBING REFERENCE SIGNAL CONFIGURATION,” filed Jul. 28, 2021, whichclaims the benefit of U.S. Provisional Patent Application No. 63/078,757by Ly et al., entitled “DISTORTION PROBING REFERENCE SIGNALCONFIGURATION,” filed Sep. 15, 2020, each of which is assigned to theassignee hereof, and each of which is expressly incorporated byreference herein.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including configuringa distortion probing reference signal.

BACKGROUND

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform spread orthogonal frequency division multiplexing(DFT-S-OFDM). A wireless multiple-access communications system mayinclude one or more base stations or one or more network access nodes,each simultaneously supporting communication for multiple communicationdevices, which may be otherwise known as user equipment (UE).

A wireless device (e.g., a UE or base station) may transmit a signalusing transmission components that include both linear and non-linearoperating regions. In some examples, the wireless device may limitcharacteristics of a transmission to ensure that the transmissioncomponents are operated primarily (e.g., solely) within the linearoperating region.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support distortion probing reference signalconfiguration. A configuration for a reference signal used to determinea non-linear behavior of transmission components at a transmittingdevice may be determined. The configuration for the reference signal maybe determined based on signaling transmitted by the transmitting device,signaling transmitted by a device that receives the reference signal, orboth. Additionally, or alternatively, the configuration for thereference signal may be determined based on a configuration of othersignals transmitted by the transmitting device prior to or concurrentlywith the transmission of the reference signal. The determinedconfiguration may be used to generate and transmit the reference signalor to determine a configuration of a received reference signal. In bothcases, a non-linear response of transmission components at thetransmitting device may be determined based on the reference signal.

A method for wireless communication at a transmitting device isdescribed. The method may include determining a configuration for adistortion probing reference signal, generating, based on theconfiguration, the distortion probing reference signal using a sequenceassociated with a peak-to-average power ratio, where a transmissioncomponent at the transmitting device operates in a non-linear operatingregion based on the peak-to-average power ratio, and transmitting thegenerated distortion probing reference signal, the distortion probingreference signal associated with the peak-to-average power ratio.

An apparatus for wireless communication at a transmitting device isdescribed. The apparatus may include a processor, memory coupled withthe processor, and instructions stored in the memory. The instructionsmay be executable by the processor to cause the apparatus to determine aconfiguration for a distortion probing reference signal, generating,base at least in part on the configuration, the distortion probingreference signal using a sequence associated with a peak-to-averagepower ratio, where a transmission component at the transmitting deviceoperates in a non-linear operating region based on the peak-to-averagepower ratio, and transmit the generated distortion probing referencesignal, the distortion probing reference signal associated with thepeak-to-average power ratio.

Another apparatus for wireless communication at a transmitting device isdescribed. The apparatus may include means for determining aconfiguration for a distortion probing reference signal, means forgenerating, based on the configuration, the distortion probing referencesignal using a sequence associated with a peak-to-average power ratio,where a transmission component at the transmitting device operates in anon-linear operating region based on the peak-to-average power ratio,and means for transmitting the generated distortion probing referencesignal, the distortion probing reference signal associated with thepeak-to-average power ratio.

A non-transitory computer-readable medium storing code for wirelesscommunication at a transmitting device is described. The code mayinclude instructions executable by a processor to determine aconfiguration for a distortion probing reference signal, generating,base at least in part on the configuration, the distortion probingreference signal using a sequence associated with a peak-to-averagepower ratio, where a transmission component at the transmitting deviceoperates in a non-linear operating region based on the peak-to-averagepower ratio, and transmit the generated distortion probing referencesignal, the distortion probing reference signal associated with thepeak-to-average power ratio.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining anon-linear response of the transmission component based on thedistortion probing reference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving an indicationof a waveform type for the distortion probing reference signal, wherethe configuration for the distortion probing reference signal may bebased on the waveform type.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the indication of thewaveform type may be received in a system information message, a mediumaccess control channel element, a downlink control information message,a radio resource control message, a random access channel message, orany combination thereof.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for selecting a waveformtype for the distortion probing reference signal, where theconfiguration for the distortion probing reference signal may be basedon the waveform type and indicating, to a receiving device, the waveformtype selected by the transmitting device.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, indicating the waveform typemay include operations, features, means, or instructions fortransmitting an indication of the waveform type in a system informationmessage, a medium access control channel element, a downlink controlinformation message, a radio resource control message, a random accesschannel message, or any combination thereof.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, indicating the waveform typemay include operations, features, means, or instructions fortransmitting an indication of the waveform type in a random accesschannel message, an uplink control information message, or anycombination thereof.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstwaveform type for signals transmitted using a data channel, a secondwaveform type for signals transmitted using a control channel, or both,where the configuration for the distortion probing reference signal maybe based on the first waveform type or the second waveform type.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstnumerology for signals transmitted using a data channel in a bandwidthpart, a second numerology for signals transmitted using a controlchannel in the bandwidth part, a third numerology for reference signalstransmitted in the bandwidth part, or any combination thereof, where theconfiguration for the distortion probing reference signal may be basedon the first numerology, the second numerology, or the third.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for activating a firstbandwidth part and a second bandwidth part for communications anddetermining a first numerology for signals transmitted using a datachannel in the first bandwidth part, a second numerology for signalstransmitted using a control channel in the first bandwidth part, a thirdnumerology for reference signals transmitted in the first bandwidthpart, or any combination thereof, where the configuration for thedistortion probing reference signal may be based on the firstnumerology, the second numerology, or the third numerology, and thedistortion probing reference signal may be transmitted in the firstbandwidth part.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first numerologyassociated with the first bandwidth part may be different from thesecond numerology associated with the second bandwidth part.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for activating a firstbandwidth part and a second bandwidth part for communications,determining a first numerology for signals transmitted using a datachannel in the first bandwidth part, a second numerology for signalstransmitted using a control channel in the first bandwidth part, a thirdnumerology for reference signals transmitted in the first bandwidthpart, or any combination thereof, determining a fourth numerology forsignals transmitted using the data channel in the second bandwidth part,a fifth numerology for signals transmitted using the control channel inthe second bandwidth part, a sixth numerology for reference signalstransmitted in the second bandwidth part, or any combination thereof,where the configuration for the distortion probing reference signal maybe based on the first numerology, the second numerology, the thirdnumerology, the fourth numerology, the fifth numerology, or the sixthnumerology, and where transmitting the distortion probing referencesignal includes transmitting a first component of the distortion probingreference signal based on the first numerology, the second numerology,or the third numerology for transmission in the first bandwidth part,and transmitting a second component of the distortion probing referencesignal based on the fourth numerology, the fifth numerology, or thesixth numerology for transmission in the second bandwidth part.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining asynchronization signal block index configured for a receiving device,where the configuration for the distortion probing reference signal maybe based on the synchronization signal block index and the distortionprobing reference signal may be transmitted using a transmission spatialdomain filter corresponding to the synchronization signal block index.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstcorrespondence between a control channel and a first reference signal, asecond correspondence between a data channel and a second referencesignal, or both based on a transmission configuration indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for indicating, to areceiving device, that the first reference signal corresponds to thedistortion probing reference signal based on the first correspondencebetween the control channel and the first reference signal andindicating, to the receiving device, that the second reference signalcorresponds to the distortion probing reference signal based on thesecond correspondence between the data channel and the second referencesignal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for indicating, to areceiving device, a third correspondence between the distortion probingreference signal and a third reference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a first setof spatial filtering coefficients for signals transmitted using a datachannel, a second set of spatial filtering coefficients for signalstransmitted using a control channel, or both, where the configurationfor the distortion probing reference signal may be based on the firstset of spatial filtering coefficients or the second set of spatialfiltering coefficients.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a set ofone or more spatial filtering coefficients for signals transmitted usinga random access channel, where the configuration for the distortionprobing reference signal may be based on the set of spatial filteringcoefficients.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving an indicationof a set of one or more spatial filtering coefficients for thedistortion probing reference signal, where the configuration for thedistortion probing reference signal may be based on the set of spatialfiltering coefficients.

A method for wireless communication at a receiving device is described.The method may include determining a configuration for a distortionprobing reference signal, receiving, based on the configuration, thedistortion probing reference signal from a transmitting device, thedistortion probing reference signal including a peak-to-average powerratio associated with a non-linear operating region of a transmittingcomponent, and determining a non-linear response of a transmissioncomponent of the transmitting device based on the distortion probingreference signal.

An apparatus for wireless communication at a receiving device isdescribed. The apparatus may include a processor, memory coupled withthe processor, and instructions stored in the memory. The instructionsmay be executable by the processor to cause the apparatus to determine aconfiguration for a distortion probing reference signal, receive, basedon the configuration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal including apeak-to-average power ratio associated with a non-linear operatingregion of a transmitting component, and determine a non-linear responseof a transmission component of the transmitting device based on thedistortion probing reference signal.

Another apparatus for wireless communication at a receiving device isdescribed. The apparatus may include means for determining aconfiguration for a distortion probing reference signal, means forreceiving, based on the configuration, the distortion probing referencesignal from a transmitting device, the distortion probing referencesignal including a peak-to-average power ratio associated with anon-linear operating region of a transmitting component, and means fordetermining a non-linear response of a transmission component of thetransmitting device based on the distortion probing reference signal.

A non-transitory computer-readable medium storing code for wirelesscommunication at a receiving device is described. The code may includeinstructions executable by a processor to determine a configuration fora distortion probing reference signal, receive, based on theconfiguration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal including apeak-to-average power ratio associated with a non-linear operatingregion of a transmitting component, and determine a non-linear responseof a transmission component of the transmitting device based on thedistortion probing reference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting anindication of a waveform type for the distortion probing referencesignal, where the configuration for the distortion probing referencesignal may be based on the waveform type.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving an indicationof a waveform type for the distortion probing reference signal, wherethe configuration for the distortion probing reference signal may bebased on the waveform type.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstwaveform type for signals transmitted using a data channel, a secondwaveform type for signals transmitted using a control channel, or both,where the configuration for the distortion probing reference signal maybe based on the first waveform type or the second waveform type.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstnumerology for signals transmitted using a data channel in a bandwidthpart, a second numerology for signals transmitted using a controlchannel in the bandwidth part, a third numerology for reference signalstransmitted in the bandwidth part, or any combination thereof, where theconfiguration for the distortion probing reference signal may be basedon the first numerology, the second numerology, or the third numerology.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for activating a firstbandwidth part and a second bandwidth part for communications anddetermining a first numerology for signals transmitted using a datachannel in the first bandwidth part, a second numerology for signalstransmitted using a control channel in the first bandwidth part, a thirdnumerology for reference signals transmitted in the first bandwidthpart, or any combination thereof, where the configuration for thedistortion probing reference signal may be based on the firstnumerology, the second numerology, or the third numerology, and thedistortion probing reference signal may be received in the firstbandwidth part.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for activating a firstbandwidth part and a second bandwidth part for communications,determining a first numerology for signals transmitted using a datachannel in the first bandwidth part, a second numerology for signalstransmitted using a control channel in the first bandwidth part, a thirdnumerology for reference signals transmitted in the first bandwidthpart, or any combination thereof, and determining a fourth numerologyfor signals transmitted using the data channel in the second bandwidthpart, a fifth numerology for signals transmitted using the controlchannel in the second bandwidth part, a sixth numerology for referencesignals transmitted in the second bandwidth part, or any combinationthereof, where the configuration for the distortion probing referencesignal may be based on the first numerology, the second numerology, thethird numerology, the fourth numerology, the fifth numerology, or thesixth numerology.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying asynchronization signal block index corresponding to a transmissionspatial domain filter and where the distortion probing reference signalmay be received based on a quasi-colocation between signals transmittedduring the synchronization signal block index and the distortion probingreference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a firstcorrespondence between a control channel and a first reference signal, asecond correspondence between a data channel and a second referencesignal, or both based on a transmission configuration indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining that thefirst reference signal corresponds to the distortion probing referencesignal based on the first correspondence between the control channel andthe first reference signal and determining that the second referencesignal corresponds to the distortion probing reference signal based onthe second correspondence between the data channel and the firstreference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving an indicationof a third correspondence between the distortion probing referencesignal and a third reference signal.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a first setof spatial filtering coefficients for signals transmitted using a datachannel, a second set of spatial filtering coefficients for signalstransmitted using a control channel, a third set of spatial filteringcoefficients for signal transmitted using a random access channel, orany combination thereof, where the configuration for the distortionprobing reference signal may be based on the first set of spatialfiltering coefficients, the second set of spatial filteringcoefficients, or the third set of spatial filtering coefficients.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for indicating a set of oneor more spatial filtering coefficients for the distortion probingreference signal, where the configuration for the distortion probingreference signal may be based on the set of spatial filteringcoefficients.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports configuring a distortion probing reference signal in accordancewith aspects of the present disclosure.

FIG. 2 illustrates an example of a wireless communications subsystemthat supports configuring a distortion probing reference signal inaccordance with aspects of the present disclosure.

FIGS. 3 and 4 illustrate examples of process flows that supportconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure.

FIGS. 5 and 6 show block diagrams of devices that support distortionprobing reference signal configuration in accordance with aspects of thepresent disclosure.

FIG. 7 shows a block diagram of a communications manager that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure.

FIGS. 8 and 9 show diagrams of systems including a device that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure.

FIGS. 10 and 11 show flowcharts illustrating methods that supportdistortion probing reference signal configuration in accordance withaspects of the present disclosure.

DETAILED DESCRIPTION

To maintain an operation of transmission components (e.g., a poweramplifier, antenna, etc.) at a wireless device within a linear operatingregion, a transmitting device may limit the power of signals inputtedinto the transmission components—which may be referred to as operatingthe transmission components with a power backoff. To facilitate suchoperation, signals having low peak-to-average-power (PAPR) ratios may beinputted into transmission components. However, limiting the power ofsignals inputted into transmission components may reduce the efficiencyof the transmission components. Distortion probing reference signals(DPRSs) may enable a transmitting device to determine a model fortransmission components that describes the behavior of the transmissioncomponents while operating in a non-linear region. The model may be usedto derive an encoding scheme for the transmitting device, a decodingscheme for the receiving device, or both. The encoding and decodingschemes may be used to compensate for the non-linear behavior of thetransmission components. Thus, DPRS transmissions may enable atransmitting device to transmit and a receiving device to receivetransmissions that are generated with less (or without) backoff.

Techniques for configuring the transmission parameters (e.g., waveform,numerology, beamforming characteristics) of a DPRS transmission may beunestablished. Similarly, techniques for determining a configuration ofthe transmission parameters used to transmit a received DPRS may beunestablished.

Thus, techniques for configuring and determining a configuration oftransmission parameters for DPRS transmissions may be determined. Thetechniques may include procedures used to select a configuration for aDPRS transmission and to determine a configuration used for a receivedDPRS. Additionally, the techniques may include establishing signalingthat is used to indicate a configuration for a DPRS transmission or torequest a configuration for a DPRS transmission. In some examples, atransmitting device may determine a configuration for a DPRStransmission based on channel conditions. In some examples, atransmitting device determines a configuration for a DPRS transmissionbased on received configuration signaling. And, in some examples, atransmitting device may determine a configuration for a DPRStransmission based on a configuration of related transmissions (e.g.,concurrent data or control channel transmissions). The transmittingdevice may generate the DPRS in accordance with the determinedconfiguration and transmit the generated DPRS to a receiving device,where a non-linear behavior of transmission components at thetransmitting device may be determined based on the transmitted DPRS.

Similarly, a receiving device may determine a configuration of areceived DPRS based on determined channel conditions, receivedconfiguration signaling, a configuration of related transmissionsreceived at the receiving device, or any combination thereof. The DPRSreceived at the receiving device may be used by the receiving device todetermine a non-linear behavior of the transmission components.

Aspects of the disclosure are initially described in the context ofwireless communications systems. Aspects of the disclosure are alsodescribed using process flows. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to distortion probingreference signal configuration.

FIG. 1 illustrates an example of a wireless communications system 100that supports configuring a distortion probing reference signal inaccordance with aspects of the present disclosure. The wirelesscommunications system 100 may include one or more base stations 105, oneor more UEs 115, and a core network 130. In some examples, the wirelesscommunications system 100 may be a Long-Term Evolution (LTE) network, anLTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR)network. In some examples, the wireless communications system 100 maysupport enhanced broadband communications, ultra-reliable (e.g., missioncritical) communications, low latency communications, communicationswith low-cost and low-complexity devices, or any combination thereof

The base stations 105 may be dispersed throughout a geographic area toform the wireless communications system 100 and may be devices indifferent forms or having different capabilities. The base stations 105and the UEs 115 may wirelessly communicate via one or more communicationlinks 125. Each base station 105 may provide a coverage area 110 overwhich the UEs 115 and the base station 105 may establish one or morecommunication links 125. The coverage area 110 may be an example of ageographic area over which a base station 105 and a UE 115 may supportthe communication of signals according to one or more radio accesstechnologies.

The UEs 115 may be dispersed throughout a coverage area 110 of thewireless communications system 100, and each UE 115 may be stationary,or mobile, or both at different times. The UEs 115 may be devices indifferent forms or having different capabilities. Some example UEs 115are illustrated in FIG. 1 . The UEs 115 described herein may be able tocommunicate with various types of devices, such as other UEs 115, thebase stations 105, or network equipment (e.g., core network nodes, relaydevices, integrated access and backhaul (IAB) nodes, or another networkequipment), as shown in FIG. 1 .

The base stations 105 may communicate with the core network 130, or withone another, or both. For example, the base stations 105 may interfacewith the core network 130 through one or more backhaul links 120 (e.g.,via an S1, N2, N3, or another interface). The base stations 105 maycommunicate with one another over the backhaul links 120 (e.g., via anX2, Xn, or other interface) either directly (e.g., directly between basestations 105), or indirectly (e.g., via core network 130), or both. Insome examples, the backhaul links 120 may be or include one or morewireless links.

One or more of the base stations 105 described herein may include or maybe referred to by a person having ordinary skill in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or agiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or other suitable terminology.

A UE 115 may include or may be referred to as a mobile device, awireless device, a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client, amongother examples. A UE 115 may also include or may be referred to as apersonal electronic device such as a cellular phone, a personal digitalassistant (PDA), a tablet computer, a laptop computer, or a personalcomputer. In some examples, a UE 115 may include or be referred to as awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or a machine type communications(MTC) device, among other examples, which may be implemented in variousobjects such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be able to communicate with varioustypes of devices, such as other UEs 115 that may sometimes act as relaysas well as the base stations 105 and the network equipment includingmacro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations,among other examples, as shown in FIG. 1 .

The UEs 115 and the base stations 105 may wirelessly communicate withone another via one or more communication links 125 over one or morecarriers. The term “carrier” may refer to a set of radio frequencyspectrum resources having a defined physical layer structure forsupporting the communication links 125. For example, a carrier used fora communication link 125 may include a portion of a radio frequencyspectrum band (e.g., a bandwidth part (BWP)) that is operated accordingto one or more physical layer channels for a given radio accesstechnology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layerchannel may carry acquisition signaling (e.g., synchronization signals,system information), control signaling that coordinates operation forthe carrier, user data, or other signaling. The wireless communicationssystem 100 may support communication with a UE 115 using carrieraggregation or multi-carrier operation. A UE 115 may be configured withmultiple downlink component carriers and one or more uplink componentcarriers according to a carrier aggregation configuration. Carrieraggregation may be used with both frequency division duplexing (FDD) andtime division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), acarrier may also have acquisition signaling or control signaling thatcoordinates operations for other carriers. A carrier may be associatedwith a frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by the UEs 115. A carrier may beoperated in a standalone mode where initial acquisition and connectionmay be conducted by the UEs 115 via the carrier, or the carrier may beoperated in a non-standalone mode where a connection is anchored using adifferent carrier (e.g., of the same or a different radio accesstechnology).

The communication links 125 shown in the wireless communications system100 may include uplink transmissions from a UE 115 to a base station105, or downlink transmissions from a base station 105 to a UE 115.Carriers may carry downlink or uplink communications (e.g., in an FDDmode) or may be configured to carry downlink and uplink communications(e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of determined bandwidths for carriers of a particular radioaccess technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz(MHz)). Devices of the wireless communications system 100 (e.g., thebase stations 105, the UEs 115, or both) may have hardwareconfigurations that support communications over a particular carrierbandwidth or may be configurable to support communications over one of aset of carrier bandwidths. In some examples, the wireless communicationssystem 100 may include base stations 105 or UEs 115 that supportsimultaneous communications via carriers associated with multiplecarrier bandwidths. In some examples, each served UE 115 may beconfigured for operating over portions (e.g., a sub-band, a BWP) or allof a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiplesubcarriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread orthogonal frequency division multiplexing(DFT-S-OFDM)). In a system employing MCM techniques, a resource elementmay consist of one symbol period (e.g., a duration of one modulationsymbol) and one subcarrier, where the symbol period and subcarrierspacing are inversely related. The number of bits carried by eachresource element may depend on the modulation scheme (e.g., the order ofthe modulation scheme, the coding rate of the modulation scheme, orboth). Thus, the more resource elements that a UE 115 receives and thehigher the order of the modulation scheme, the higher the data rate maybe for the UE 115. A wireless communications resource may refer to acombination of a radio frequency spectrum resource, a time resource, anda spatial resource (e.g., spatial layers or beams), and the use ofmultiple spatial layers may further increase the data rate or dataintegrity for communications with a UE 115.

One or more numerologies for a carrier may be supported, where anumerology may include a subcarrier spacing (Δf) and a cyclic prefix. Acarrier may be divided into one or more BWPs having the same ordifferent numerologies. In some examples, a UE 115 may be configuredwith multiple BWPs. In some examples, a single BWP for a carrier may beactive at a given time and communications for the UE 115 may berestricted to one or more active BWPs.

The time intervals for the base stations 105 or the UEs 115 may beexpressed in multiples of a basic time unit which may, for example,refer to a sampling period of T_(s)=1/(Δf_(max)·N_(f)) seconds, whereΔf_(max) may represent the maximum supported subcarrier spacing, andΔ_(f) may represent the maximum supported discrete Fourier transform(DFT) size. Time intervals of a communications resource may be organizedaccording to radio frames each having a specified duration (e.g., 10milliseconds (ms)). Each radio frame may be identified by a system framenumber (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes orslots, and each subframe or slot may have the same duration. In someexamples, a frame may be divided (e.g., in the time domain) intosubframes, and each subframe may be further divided into a number ofslots. Alternatively, each frame may include a variable number of slots,and the number of slots may depend on subcarrier spacing. Each slot mayinclude a number of symbol periods (e.g., depending on the length of thecyclic prefix prepended to each symbol period). In some wirelesscommunications systems 100, a slot may further be divided into multiplemini-slots containing one or more symbols. Excluding the cyclic prefix,each symbol period may contain one or more (e.g., N_(f)) samplingperiods. The duration of a symbol period may depend on the subcarrierspacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallestscheduling unit (e.g., in the time domain) of the wirelesscommunications system 100 and may be referred to as a transmission timeinterval (TTI). In some examples, the TTI duration (e.g., the number ofsymbol periods in a TTI) may be variable. Additionally, oralternatively, the smallest scheduling unit of the wirelesscommunications system 100 may be dynamically selected (e.g., in burstsof shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using one or more oftime division multiplexing (TDM) techniques, frequency divisionmultiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A controlregion (e.g., a control resource set (CORESET)) for a physical controlchannel may be defined by a number of symbol periods and may extendacross the system bandwidth or a subset of the system bandwidth of thecarrier. One or more control regions (e.g., CORESETs) may be configuredfor a set of the UEs 115. For example, one or more of the UEs 115 maymonitor or search control regions for control information according toone or more search space sets, and each search space set may include oneor multiple control channel candidates in one or more aggregation levelsarranged in a cascaded manner. An aggregation level for a controlchannel candidate may refer to a number of control channel resources(e.g., control channel elements (CCEs)) associated with encodedinformation for a control information format having a given payloadsize. Search space sets may include common search space sets configuredfor sending control information to multiple UEs 115 and UE-specificsearch space sets for sending control information to a specific UE 115.

In some examples, a base station 105 may be movable and thereforeprovide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas 110associated with different technologies may overlap, but the differentgeographic coverage areas 110 may be supported by the same base station105. In other examples, the overlapping geographic coverage areas 110associated with different technologies may be supported by differentbase stations 105. The wireless communications system 100 may include,for example, a heterogeneous network in which different types of thebase stations 105 provide coverage for various geographic coverage areas110 using the same or different radio access technologies.

The wireless communications system 100 may be configured to supportultra-reliable communications or low-latency communications, or variouscombinations thereof. For example, the wireless communications system100 may be configured to support ultra-reliable low-latencycommunications (URLLC) or mission critical communications. The UEs 115may be designed to support ultra-reliable, low-latency, or criticalfunctions (e.g., mission critical functions). Ultra-reliablecommunications may include private communication or group communicationand may be supported by one or more mission critical services such asmission critical push-to-talk (MCPTT), mission critical video (MCVideo),or mission critical data (MCData). Support for mission criticalfunctions may include prioritization of services, and mission criticalservices may be used for public safety or general commercialapplications. The terms ultra-reliable, low-latency, mission critical,and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE 115 may also be able to communicate directly withother UEs 115 over a device-to-device (D2D) communication link 135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115utilizing D2D communications may be within the geographic coverage area110 of a base station 105. Other UEs 115 in such a group may be outsidethe geographic coverage area 110 of a base station 105 or be otherwiseunable to receive transmissions from a base station 105. In someexamples, groups of the UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some examples, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out between the UEs 115 withoutthe involvement of a base station 105.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC) or 5G core (5GC), which may include at leastone control plane entity that manages access and mobility (e.g., amobility management entity (MME), an access and mobility managementfunction (AMF)) and at least one user plane entity that routes packetsor interconnects to external networks (e.g., a serving gateway (S-GW), aPacket Data Network (PDN) gateway (P-GW), or a user plane function(UPF)). The control plane entity may manage non-access stratum (NAS)functions such as mobility, authentication, and bearer management forthe UEs 115 served by the base stations 105 associated with the corenetwork 130. User IP packets may be transferred through the user planeentity, which may provide IP address allocation as well as otherfunctions. The user plane entity may be connected to the networkoperators IP services 150. The operators IP services 150 may includeaccess to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS),or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station 105, may includesubcomponents such as an access network entity 140, which may be anexample of an access node controller (ANC). Each access network entity140 may communicate with the UEs 115 through one or more other accessnetwork transmission entities 145, which may be referred to as radioheads, smart radio heads, or transmission/reception points (TRPs). Eachaccess network transmission entity 145 may include one or more antennapanels. In some configurations, various functions of each access networkentity 140 or base station 105 may be distributed across various networkdevices (e.g., radio heads and ANCs) or consolidated into a singlenetwork device (e.g., a base station 105).

The wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 megahertz (MHz) to 300gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known asthe ultra-high frequency (UHF) region or decimeter band because thewavelengths range from approximately one decimeter to one meter inlength. The UHF waves may be blocked or redirected by buildings andenvironmental features, but the waves may penetrate structuressufficiently for a macro cell to provide service to the UEs 115 locatedindoors. The transmission of UHF waves may be associated with smallerantennas and shorter ranges (e.g., less than 100 kilometers) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

The wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band, or in an extremely high frequency (EHF)region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as themillimeter band. In some examples, the wireless communications system100 may support millimeter wave (mmW) communications between the UEs 115and the base stations 105, and EHF antennas of the respective devicesmay be smaller and more closely spaced than UHF antennas. In someexamples, this may facilitate use of antenna arrays within a device. Thepropagation of EHF transmissions, however, may be subject to evengreater atmospheric attenuation and shorter range than SHF or UHFtransmissions. The techniques disclosed herein may be employed acrosstransmissions that use one or more different frequency regions, anddesignated use of bands across these frequency regions may differ bycountry or regulating body.

The wireless communications system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, the wirelesscommunications system 100 may employ License Assisted Access (LAA),LTE-Unlicensed (LTE-U) radio access technology, or NR technology in anunlicensed band such as the 5 GHz industrial, scientific, and medical(ISM) band. When operating in unlicensed radio frequency spectrum bands,devices such as the base stations 105 and the UEs 115 may employ carriersensing for collision detection and avoidance. In some examples,operations in unlicensed bands may be based on a carrier aggregationconfiguration in conjunction with component carriers operating in alicensed band (e.g., LAA). Operations in unlicensed spectrum may includedownlink transmissions, uplink transmissions, P2P transmissions, or D2Dtransmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas,which may be used to employ techniques such as transmit diversity,receive diversity, multiple-input multiple-output (MIMO) communications,or beamforming. The antennas of a base station 105 or a UE 115 may belocated within one or more antenna arrays or antenna panels, which maysupport MIMO operations or transmit or receive beamforming. For example,one or more base station antennas or antenna arrays may be co-located atan antenna assembly, such as an antenna tower. In some examples,antennas or antenna arrays associated with a base station 105 may belocated in diverse geographic locations. A base station 105 may have anantenna array with a number of rows and columns of antenna ports thatthe base station 105 may use to support beamforming of communicationswith a UE 115. Likewise, a UE 115 may have one or more antenna arraysthat may support various MIMO or beamforming operations. Additionally,or alternatively, an antenna panel may support radio frequencybeamforming for a signal transmitted via an antenna port.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105, a UE 115) to shape or steeran antenna beam (e.g., a transmit beam, a receive beam) along a spatialpath between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that some signals propagatingat particular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying amplitude offsets, phase offsets, or both to signals carriedvia the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

A base station 105 or a UE 115 may use beam sweeping techniques as partof beam forming operations. For example, a base station 105 may usemultiple antennas or antenna arrays (e.g., antenna panels) to conductbeamforming operations for directional communications with a UE 115.Some signals (e.g., synchronization signals, reference signals, beamselection signals, or other control signals) may be transmitted by abase station 105 multiple times in different directions. For example,the base station 105 may transmit a signal according to differentbeamforming weight sets associated with different directions oftransmission. Transmissions in different beam directions may be used toidentify (e.g., by a transmitting device, such as a base station 105, orby a receiving device, such as a UE 115) a beam direction for latertransmission or reception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based on asignal that was transmitted in one or more beam directions. For example,a UE 115 may receive one or more of the signals transmitted by the basestation 105 in different directions and may report to the base station105 an indication of the signal that the UE 115 received with a highestsignal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station 105or a UE 115) may be performed using multiple beam directions, and thedevice may use a combination of digital precoding or radio frequencybeamforming to generate a combined beam for transmission (e.g., from abase station 105 to a UE 115). The UE 115 may report feedback thatindicates precoding weights for one or more beam directions, and thefeedback may correspond to a configured number of beams across a systembandwidth or one or more sub-bands. The base station 105 may transmit areference signal (e.g., a cell-specific reference signal (CRS), achannel state information reference signal (CSI-RS)), which may beprecoded or unprecoded. The UE 115 may provide feedback for beamselection, which may be a precoding matrix indicator (PMI) orcodebook-based feedback (e.g., a multi-panel type codebook, a linearcombination type codebook, a port selection type codebook). Althoughthese techniques are described with reference to signals transmitted inone or more directions by a base station 105, a UE 115 may employsimilar techniques for transmitting signals multiple times in differentdirections (e.g., for identifying a beam direction for subsequenttransmission or reception by the UE 115) or for transmitting a signal ina single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE 115) may try multiple receiveconfigurations (e.g., directional listening) when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets (e.g., differentdirectional listening weight sets) applied to signals received atmultiple antenna elements of an antenna array, or by processing receivedsignals according to different receive beamforming weight sets appliedto signals received at multiple antenna elements of an antenna array,any of which may be referred to as “listening” according to differentreceive configurations or receive directions. In some examples, areceiving device may use a single receive configuration to receive alonga single beam direction (e.g., when receiving a data signal). The singlereceive configuration may be aligned in a beam direction determinedbased on listening according to different receive configurationdirections (e.g., a beam direction determined to have a highest signalstrength, highest signal-to-noise ratio (SNR), or otherwise acceptablesignal quality based on listening according to multiple beamdirections).

Wireless devices (e.g., a base station 105 or UE 115) may use differenttypes of signaling waveforms (e.g., OFDM waveforms) to wirelesslycommunicate information between one another. For example, wirelessdevices may use CP-OFDM waveforms to communicate with one another.Additionally, or alternatively, wireless devices may use DFT-s-OFDMwaveforms to communicate with one another. Signals transmitted using onewaveform type may have different characteristics than signalstransmitted using another waveform type—e.g., even when those signalscarry the same set of data. For example, signals transmitted usingCP-OFDM waveforms may be associated with a higher PAPR than signalstransmitted using DFT-s-OFDM waveforms.

A wireless device (e.g., a base station 105 or UE 115) may include apower amplifier that supports transmitting a signal (e.g., by amplifyingan input signal) to another wireless device. The power amplifier mayhave a linear operating region and a non-linear operating region. In thelinear operating region, the power amplifier may output signals that areproportional to signals input to the amplifier—e.g., the power amplifiermay output signals that are ten times more powerful than the signalsinput to the amplifier while operating in the linear operating region.In the non-linear operating region, the power amplifier may outputsignals that are not proportionally related to the signals input to thepower amplifier—e.g., the power amplifier may amplify input signals by afactor that is greater than or less than the amplification factor in thelinear operating region. The power amplifier may also introducefrequency distortions into the output signal that can lead tointerference across subcarriers of a symbol. In some examples, the poweramplifier operates in the linear operating region if signals having asignal power within a first power range are inputted into the poweramplifier. And the power amplifier operates in the linear operatingregion if signals having a signal power within a second power range areinputted into the power amplifier.

To increase a reliability of transmissions, the wireless device mayapply a backoff to the power amplifier. That is, the wireless device mayavoid inputting signals into the power amplifier that may cause thepower amplifier to operate in the non-linear region. Thus, the wirelessdevice may primarily operate the power amplifier in the linear regionand avoid introducing undesirable frequency components into an OFDMsymbol transmission. However, limiting the input range of a poweramplifier may result in configuring transmitting devices withinefficient power amplifiers—e.g., because power amplifiers may beoperated in a small region of their full operating range.

Reference signals may be used to support communications between wirelessdevices—e.g., to increase a reliability and/or throughput ofcommunications. In some examples, reference signals (e.g., ademodulation reference signal (DMRS), CSI-RS, sounding reference signal(SRS), etc.) may be used to estimate channel characteristics, includingtime and frequency-domain responses. In some examples, a referencesignal may be used to compensate for non-linearities introduced into asignal by a power amplifier and may be referred to as a DPRS. A DPRS mayenable a transmitting device to use a full (or at least larger)operating region of a power amplifier. A DPRS may be generated using ascrambling sequence that is associated with a high PAPR. For high PAPRsignals, a difference between an average power of the signal and a peakinstantaneous power of the signal may exceed a threshold. One or moreDPRS transmissions may be used to train a neural network that models thenon-linearity of the power amplifier. A DPRS may be transmittedinfrequently in accordance with a radio resource control (RRC)configuration or as triggered by downlink control information (DCI).

In some examples, a transmitting device (e.g., a base station 105 or UE115) transmits a DPRS and samples (e.g., “sniffs”) the transmitted DPRSto train the neural network. After modeling the non-linearity of thepower amplifier, the transmitting device may use the neural network totrain a second neural network used for encoding information (which maybe referred to as a neural network (NN) transmission encoder) and athird neural network for decoding information (which may be referred toas an NN reception decoder). The transmitting device may use the NNtransmission encoder to encode information prior to transmission and maysignal the NN reception decoder to a receiving device (e.g., a basestation 105 or UE 115). The receiving device may receive the encodedtransmission using the NN reception decoder. In another example, thetransmitting device may transmit the neural network that models thenon-linearity of the power amplifier to the receiving device, and thereceiving device may use the neural network to determine an NN receptiondecoder.

Additionally, or alternatively, a transmitting device may transmit aDPRS and a DMRS to a receiving device. The receiving device may use theDMRS to estimate a linear channel between the transmitting and receivingdevice (without non-linearities introduced by a power amplifier) and mayuse the DPRS to estimate the channel including the non-linearitiesintroduced by the power amplifier. The receiving device may compare thechannel estimates to train a neural network that models thenon-linearity of the power amplifier. After modeling the non-linearityof the power amplifier, the receiving device may use the neural networkto train a second neural network used for encoding information (whichmay be referred to as a neural network (NN) transmission encoder) and athird neural network for decoding information (which may be referred toas an NN reception decoder). The receiving device may signal the NNreception encoder to the transmitting device, which may encodetransmissions to the receiving device using the NN reception encoder.Also, the receiving device may receive encoded transmissions from thetransmitting device using the NN reception decoder. In another example,the receiving device may transmit the neural network that models thenon-linearity of the power amplifier to the transmitting device, and thetransmitting device may use the neural network to determine an NNencoder.

As described herein, to maintain an operation of transmission components(e.g., a power amplifier, antenna, etc.) that supports signaltransmission within a linear operating region, a transmitting device maylimit the power of signals inputted into the transmission components.That is, the transmitting device may operate the transmission componentswith a power backoff. To facilitate such operation, signals having lowPAPR ratios may be inputted into transmission components. However,limiting the power of signals inputted into transmission components mayreduce the efficiency of the transmission components. As also describedherein, distortion probing reference signals (DPRSs) may enable atransmitting device to determine a model for transmission componentsthat describes the behavior of the transmission components whileoperating in a non-linear region. The model may be used to derive anencoding scheme for the transmitting device, a decoding scheme for thereceiving device, or both that compensate for the non-linear behavior ofthe transmission components. Thus, DPRS transmissions may enable atransmitting device to transmit and a receiving device to receivetransmissions that are generated with less (or without) backoff.

Techniques for configuring the transmission parameters (e.g., waveform,numerology, beamforming characteristics) of a DPRS transmission may beunestablished. Similarly, techniques for determining a configuration ofthe transmission parameters used to transmit a received DPRS may beunestablished.

Thus, techniques for configuring and determining a configuration oftransmission parameters for DPRS transmissions may be determined. Thetechniques may include procedures used to select a configuration for aDPRS transmission and to determine a configured used for a receivedDPRS. Additionally, techniques may also include establishing signalingthat is used to indicate a configuration for a DPRS transmission or torequest a configuration for a DPRS transmission. In some examples, atransmitting device determines a configuration for a DPRS based onreceived configuration signaling. Additionally, or alternatively, atransmitting device may determine a configuration for a DPRS based on aconfiguration of related transmissions (e.g., data or control channeltransmissions). The transmitting device may generate the DPRS inaccordance with the determined configuration and transmit the generatedDPRS to a receiving device, where a non-linear behavior of transmissioncomponents at the transmitting device may be determined based on thetransmitted DPRS.

Similarly, a receiving device may determine a configuration of areceived DPRS based on received configuration signaling. Additionally,or alternatively, a transmitting device may determine a configurationfor a DPRS based on a configuration of related transmissions (e.g., dataor control channel transmissions) received at the receiving device. TheDPRS received at the receiving device may be used by the receivingdevice, the transmitting device, or both to determine a non-linearbehavior of the transmission components.

FIG. 2 illustrates an example of a wireless communications subsystemthat supports configuring a distortion probing reference signal inaccordance with aspects of the present disclosure.

Wireless communications subsystem 200 may include base station 205 andUE 215, which may be examples of a base station and UE described in FIG.1 . Base station 205 and UE 215 may communicate with one another withincoverage area 210 as described in FIG. 1 .

In some examples, UE 215 includes a power amplifier that is used totransmit wireless communications to other wireless devices, such as basestation 205 via uplink 245. UE 215 may also transmit a DPRS (e.g.,uplink DPRS 235) to support transmitting signals to base station 205that have high PAPRs that cause the power amplifier at UE 215 to operatein a non-linear region. UE 215 may configure one or more transmissionparameters for transmitting uplink DPRSs to base station 205. In someexamples, UE 215 may determine a waveform type to use for transmissionof uplink DPRS 235. In some examples, UE 215 transmits uplink DPRS in anCP-OFDM waveform. In other examples, UE 215 transmits uplink DPRS in aDFT-s-OFDM waveform. UE 215 may determine a waveform type to use fortransmission of uplink DPRS 235 based on a waveform type requested bybase station 205. Or UE 215 may determine a waveform type to use fortransmission of uplink DPRS 235 based on a waveform type used for othersignals included in uplink transmission 240—e.g., used for a physicaluplink control channel (PUCCH) signal, a physical uplink shared channel(PUSCH) signal, an SRS, or the like.

UE 215 may also determine a numerology (e.g., a subcarrier spacing,symbol period, cyclic prefix, etc.) to use for transmission of uplinkDPRS 235. In some examples, UE 215 may use the numerology used fortransmitting other signals within an active bandwidth part to transmituplink DPRS 235. For example, UE 215 may use the same numerology as aPUCCH signal, a PUSCH signal, CSI-RS, or the like to transmit uplinkDPRS 235. UE 215 may also determine multi-beam parameters (e.g.,beamforming weights) for the DPRS. In some examples, UE 215 may use samebeamforming weights used for transmitting a PUCCH signal, a PUSCHsignal, or a physical random access channel (PRACH) signal. In otherexamples, UE 215 may use beamforming weights indicated by base station205 to transmit uplink DPRS 235.

Similarly, base station 205 may transmit downlink DPRS 220 to UE 215 viadownlink 230. In some examples, base station 205 may determine awaveform type to use for transmission of downlink DPRS 220. Base station205 may determine the waveform type for transmission of downlink DPRS220 based on a waveform type used for other signals included in downlinktransmission 225—e.g., used for a physical downlink control channel(PDCCH) signal, a physical downlink shared channel (PDSCH) signal, aCSI-RS, or the like. In some examples, base station 205 may determinethe waveform type for transmission of downlink DPRS 220 based on awaveform type requested by UE 215.

Base station 205 may also determine a numerology to use for transmissionof downlink DPRS 220. In some examples, base station 205 may use thenumerology used for transmitting other signals within an activebandwidth part to transmit downlink DPRS 220 to UE 215. For example,base station 205 may use the same numerology as a PDCCH signal, a PDSCHsignal, CSI-RS, or the like to transmit downlink DPRS 220. Base station205 may also determine multi-beam parameters (e.g., beamforming weights,quasi-colocation (QCL) relationships, etc.) for the DPRS. In someexamples, base station 205 may use a same transmission beam (which mayalso be referred to as a transmission spatial domain filter) fordownlink DPRS 220 that corresponds to the transmission spatial domainfilter that is associated with the synchronization signal block (SSB)index configured for UE 215. In some examples, base station 205 mayindicate (or UE 215 may determine) that a transmission configurationindication (TCI) state indicator for downlink DPRS 220 is the same as aTCI state indicator for another signal in downlink transmission 225. ATCI state indicator may indicate a QCL relationship between one or morereference signals and another transmission. For example, a TCI stateindicator may indicate a quasi-colocation relationship between a delayspread determined for a channel using a CSI-RS and a delay spreadassociated with a received PUCCH signal. In some examples, base station205 may indicate a separate TCI state indicator for downlink DPRS 220that indicates a TCI state for base station 205.

FIG. 3 illustrates an example of a process flow that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure.

Process flow 300 may be performed by base station 305 and UE 315, whichmay be examples of a base station or UE in FIGS. 1 and 2 . In someexamples, process flow 300 illustrates an exemplary sequence ofoperations performed to support configuring and determining aconfiguration of a DPRS. For example, process flow 300 depictsoperations for transmitting one or more DPRSs from UE 315 to basestation 305.

It is understood that one or more of the operations described in processflow 300 may be performed earlier or later in the process, omitted,replaced, supplemented, or performed in combination with anotheroperation. Also, additional operations described herein that are notincluded in process flow 300 may be included.

At arrow 320, base station 305 and UE 315 may exchange control signaling(e.g., RRC control signaling, PRACH signaling, system information,etc.). In some examples, base station 305 and UE 315 indicate acapability to support DPRS transmission. In some examples, base station305 may indicate a waveform type (e.g., OFDM or DFT-s-OFM) that UE 315is to use for DPRS transmissions. In some examples, base station 305 mayindicate a waveform type that UE 315 is to use for other signaltransmissions (e.g., for PUCCH signal transmissions, PUSCH signaltransmissions, SRS transmissions, etc.). In other examples, UE 315 mayindicate to base station 305 a waveform type that UE 315 is to use forDPRS transmissions. Base station 305 may also indicate one or morebandwidth parts that are configured for UE 315. Additionally, basestation 305 may indicate a set of beamforming weights for DPRStransmission.

At arrow 325, UE 315 may receive control information (e.g., a downlinkgrant, an uplink grant, etc.) and data from base station 305—e.g., in acontrol channel and a data channel. In some examples, base station 305indicates configuration information for DPRS transmission in downlinkcontrol information, in a MAC-CE, or both. For example, the base stationmay include an indication of a waveform type for DPRS transmission,beamforming weights for DPRS transmission, or both. UE 315 may use DPRSconfiguration information received from base station 305 to determine aconfiguration for a DPRS transmission.

At block 330, UE 315 may configure a waveform type (e.g., OFDM orDFT-s-OFDM) for a DPRS transmission. In some examples, UE 315 configuresthe waveform type indicated by base station 305 in prior controlsignaling. In other examples, UE 315 selects the waveform type for theDPRS transmission without considering explicit signaling from basestation 305. For example, UE 315 may select a DFT-s-OFDM waveform typefor the DPRS based on being located at a cell edge or identifying anevent that triggers a coverage extension. Or UE 115 may select a CP-OFDMwaveform type for the DPRS based on a channel between the base station305 and UE 315 being classified as a good channel (e.g., having an SNRthat exceeds a threshold). In some examples, UE 315 may select awaveform type for the DPRS transmission that matches a waveform typeused for a data signal transmission—e.g., if a DFT-s-OFDM waveform isused for the data (e.g., PUSCH) signal transmission, then the DFT-s-OFDMwaveform may be used for the DPRS transmission. In other examples, UE315 may select a waveform type for the DPRS transmission that matches awaveform type used for a control (e.g., PUCCH) signal transmission—e.g.,if an CP-OFDM waveform is used for the control signal transmission, thenthe CP-OFDM waveform may be used for the DPRS transmission.

At block 335, UE 315 may configure a numerology (e.g., subcarrierspacing, symbol period, cyclic prefix, etc.) for the DPRS transmission.In some examples, UE 315 identifies an active bandwidth part anddetermines a numerology used for signals (e.g., data, control, otherreference signals, such as SRS, etc.) transmitted in the activebandwidth part. UE 315 may configure the numerology for the DPRStransmission to match the numerology used for the signals transmitted inthe active bandwidth part. In some examples, UE 315 may identifymultiple active bandwidth parts. In some examples, the DPRS is scheduledto be transmitted over one of the active bandwidth parts, and UE 315 maydetermine a numerology for signals transmitted within the activebandwidth part scheduled for transmission of the DPRS. UE 315 may usethe determined numerology to transmit the DPRS in the active bandwidthpart in accordance with the determined numerology.

In other examples, the DPRS is scheduled to be transmitted over multipleof the active bandwidth parts. In such cases, UE 315 may, for example,determine a first numerology for signals transmitted within a firstactive bandwidth part and a second numerology for signals transmittedwithin a second active bandwidth part. UE 315 may use the determinednumerology to transmit a first DPRS (or a first component of a DPRS) inthe first active bandwidth part in accordance with the first numerologyand a second DPRS (or a second component of the DPRS) in the secondactive bandwidth part in accordance with the second numerology.

At block 340, UE 315 may configure multi-beam parameters for the DPRStransmission. In some examples, UE 315 identifies a set of beamforming(or spatial filtering) weights use to transmit a control signal andconfigures the DPRS to use the same set of beamforming weights. In someexamples, UE 315 identifies a set of beamforming (or spatial filtering)weights use to transmit a data signal and configures the DPRS to use thesame set of beamforming weights. In some examples, UE 315 identifies aset of beamforming (or spatial filtering) weights use to transmit arandom access (e.g., RACH) signal and configures the DPRS to use thesame set of beamforming weights. In yet other examples, UE 315 uses aset of beamforming weights for the DPRS transmission that are requestedby base station 305 in prior control signaling.

At block 345, UE 315 may generate the DPRS in accordance with theconfigured transmission parameters. For example, UE 315 may generate theDPRS to use a DFT-s-OFDM waveform, a numerology used by signalstransmitted in a first active bandwidth part of multiple activebandwidth parts, and beamforming weights requested by base station 305.

At arrow 350, UE 315 may indicate one or more transmission parametersconfigured for the DPRS to base station 305. In some examples, UE 315indicates the waveform type selected by UE 315 for DPRStransmission—e.g., if the waveform type is not selected based on arequest from base station 305. In some examples, the indication istransmitted using random access resources. In other examples, theindication is transmitted using control resources (e.g., in an uplinkcontrol information message)—e.g., in an uplink transmission thatincludes the DPRS.

At arrow 355, UE 315 may perform an uplink transmission to base station305. The uplink transmission may include control signaling (e.g., anuplink control information (UCI) message), data signaling (e.g., a datamessage), and one or more reference signals (e.g., an SRS).

At block 360, base station 305 may determine a configuration of a DPRSreceived from UE 315 based on a DPRS configuration indication receivedfrom UE 315 and/or characteristics of an uplink transmission receivedfrom UE 315. In some examples, base station 305 may determine one ormore transmission parameters (e.g., waveform type, numerology,multi-beam parameters, etc.) for the DPRS based on the indicationreceived from UE 315. For example, base station 305 may determine awaveform type used for the DPRS based on the received indication. Basestation 305 may also determine one or more transmission parameters basedon transmission parameters used for other transmissions received in anuplink transmission. In some examples, base station 305 may determine awaveform type used for the DPRS based on a waveform type used for acontrol, data, or reference signal included in the uplink transmission(or a prior uplink transmission). For example, base station 305 maydetermine that the DPRS is transmitted using a waveform type thatmatches a waveform type used for a PUCCH signal, a PUSCH signal, or anSRS included in the uplink transmission (or a prior uplinktransmission).

In some examples, base station 305 may determine a numerology used forthe DPRS based on a numerology used to transmit a PUCCH signal in anactive bandwidth part. In some examples, base station 305 may determinea numerology used for the DPRS based on a numerology used to transmit aPUSCH signal in an active bandwidth part. Or base station 305 maydetermine a numerology used for the DPRS based on a numerology used totransmit an SRS in an active bandwidth part. In some examples, multiplebandwidth parts are active and the DPRS is transmitted over one of theactive bandwidth parts. In such cases, base station 305 may determinethat the DPRS uses a same numerology as a PUCCH signal, PUSCH signal, orSRS signal transmitted in the same bandwidth part as the DPRS. In someexamples, UE 315 and/or base station 305 are able to model thenon-linearity of the transmission components at UE 315 using the singleDPRS. In other examples, multiple bandwidth parts are active and theDPRS is transmitted over multiple of the active bandwidth parts. In suchcases, base station 305 may, for example, determine that a first DPRSuses a same numerology as a PUCCH signal, PUSCH signal, or SRS signaltransmitted in the first bandwidth part and a second DPRS uses a samenumerology as a PUCCH signal, PUSCH signal, or SRS signal transmitted ina second bandwidth part.

Base station 305 may also determine multi-beam characteristics of theDPRS. In some examples, base station 305 determines multi-beamcharacteristics of the DPRS based on multi-beam characteristicspreviously requested for the DPRS by base station 305. For example, basestation 305 may determine that a first set of beamforming weights areused for the DPRS based on previously requesting the first set ofbeamforming weights. In some examples, base station 305 determinesmulti-beam characteristics of the DPRS based on multi-beamcharacteristics of other signals transmitted in the uplink transmission.For example, base station 305 may determine that the DPRS uses a sameset of beamforming weights as a PUCCH signal, PUSCH signal, or SRSincluded in the uplink transmission (or a prior uplink transmission).

At block 365, UE 315 may determine a model that describes a non-linearbehavior of transmission components at UE 315 based on the transmittedDPRS. In some examples, UE 315 may use the transmitted DPRS to refine aneural network that is used to describe the non-linear behavior of thetransmission components. UE 315 may use the neural network to generatean encoding scheme that may be used by UE 315 to generate an uplinktransmission and decoding scheme that may be used by base station 305 todecode an uplink transmission received from UE 315 while avoiding and/orcompensating for non-linearities introduced by transmission componentsat UE 315.

At block 370, base station 305 may determine a model that describes anon-linear behavior of transmission components at UE 315 based on thetransmitted DPRS. In some examples, base station 305 may use thetransmitted DPRS to refine a neural network that is used to describe thenon-linear behavior of the transmission components. Base station 305 mayuse the neural network to generate an encoding scheme that may be usedby UE 315 to generate an uplink transmission and decoding scheme thatmay be used by base station 305 to decode an uplink transmissionreceived from UE 315 while avoiding and/or compensating fornon-linearities introduced by transmission components at UE 315.

FIG. 4 illustrates an example of a process flow that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure.

Process flow 400 may be performed by base station 405 and UE 415, whichmay be examples of a base station or UE described above with referenceto FIGS. 1 through 3 . In some examples, process flow 400 illustrates anexemplary sequence of operations performed to support configuring anddetermining a configuration of a DPRS. For example, process flow 400depicts operations for transmitting one or more DPRSs from base station405 to UE 415.

It is understood that one or more of the operations described in processflow 400 may be performed earlier or later in the process, omitted,replaced, supplemented, or performed in combination with anotheroperation. Also, additional operations described herein that are notincluded in process flow 400 may be included.

At arrow 420, base station 405 and UE 415 may exchange control signaling(e.g., RRC control signaling, PRACH signaling, system information,PDCCH/PUCCH signaling, etc.). In some examples, base station 405 and UE415 indicate a capability to support DPRS transmission. In someexamples, base station 405 may indicate a waveform type (e.g., OFDM orDFT-s-OFM) that base station 405 is to use for DPRS transmissions. Insome examples, base station 405 may indicate to UE 415 a waveform typethat base station 405 is to use for other signal transmissions (e.g.,for PDCCH signal transmissions, PDSCH signal transmissions, CSI-RStransmissions, etc.). In other examples, UE 415 may request that basestation 405 use a waveform type for DPRS transmissions. Base station 405may also indicate one or more bandwidth parts that are configured for UE415.

To support multi-beam communications, base station 405 may transmitmultiple synchronization signal blocks that are each associated with adifferent transmission spatial domain filter. UE 415 may indicate anindex of one or more of the synchronization signal blocks that areassociated with a transmission spatial domain filter preferred by UE415. Additionally, base station 405 may configure one or more TCI statesat UE 415 to indicate a QCL relationship between a set of referencesignals and other signals transmitted from base station 405 to UE 415.

At block 430, base station 405 may configure a waveform type (e.g., OFDMor DFT-s-OFDM) for a DPRS transmission. In some examples, base station405 configures the waveform type indicated by base station 405 to UE 415in prior control signaling. In other examples, base station 405configures the waveform type requested by UE 415 in prior controlsignaling. In some examples, base station 405 selects a DFT-s-OFDMwaveform for the DPRS transmission based on operating in a highfrequency band (e.g., a THz band). Otherwise, base station 405 mayselect a CP-OFDM waveform for the DPRS transmission. In some examples,base station 405 selects a waveform type for the DPRS transmission thatmatches a waveform type used for a data signal transmission—e.g., if aDFT-s-OFDM waveform is used for the data (e.g., PDSCH) signaltransmission, then the DFT-s-OFDM waveform may be used for the DPRStransmission. In other examples, UE 415 may select a waveform type forthe DPRS transmission that matches a waveform type used for a control(e.g., PDCCH) signal transmission—e.g., if an CP-OFDM waveform is usedfor the control signal transmission, then the CP-OFDM waveform may beused for the DPRS transmission.

At block 435, base station 405 may configure a numerology (e.g.,subcarrier spacing, symbol period, cyclic prefix, etc.) for the DPRStransmission. In some examples, base station 405 identifies an activebandwidth part and determines a numerology used for signals (e.g., data,control, other reference signals, such as SRS, etc.) transmitted in theactive bandwidth part. Base station 405 may configure the numerology forthe DPRS transmission to match the numerology used for the signalstransmitted in the active bandwidth part. In some examples, base station405 may identify multiple active bandwidth parts. In some examples, theDPRS is scheduled to be transmitted over one of the active bandwidthparts, and base station 405 may determine a numerology for signalstransmitted within the active bandwidth part scheduled for transmissionof the DPRS. Base station 405 may use the determined numerology totransmit the DPRS in the active bandwidth part in accordance with thedetermined numerology.

In other examples, the DPRS is scheduled to be transmitted over multipleof the active bandwidth parts. In such cases, base station 405 may, forexample, determine a first numerology for signals transmitted within afirst active bandwidth part and a second numerology for signalstransmitted within a second active bandwidth part. Base station 405 mayuse the determined numerology to transmit a first DPRS (or a firstcomponent of a DPRS) in the first active bandwidth part in accordancewith the first numerology and a second DPRS (or a second component ofthe DPRS) in the second active bandwidth part in accordance with thesecond numerology.

At block 440, base station 405 may configure multi-beam parameters forthe DPRS transmission. In some examples, base station 405 may transmitthe DPRS using a same transmission spatial domain filter thatcorresponds to an SSB index identified by UE 415. Base station 405 mayalso configure QCL relationships for the DPRS based on TCI states. Insome examples, base station 405 configures the same TCI states for theDPRS as are configured for a control (e.g., PDCCH) signal and/or datasignal (e.g., PDSCH). In other examples, base station 405 indicates aseparate TCI state for the DPRS from the control and data signaling. TheTCI state for the DPRS may indicate a QCL relationship between the DPRSand another reference signal (e.g., a CSI-RS).

At block 445, base station 405 may generate the DPRS in accordance withthe configured transmission parameters. For example, base station 405may generate the DPRS to use an CP-OFDM waveform, a numerology used bysignals transmitted in a first active bandwidth part of multiple activebandwidth parts, and a transmission spatial domain filter requested byUE 415.

At arrow 450, base station 405 may indicate one or more transmissionparameters configured for the DPRS to UE 415. In some examples, basestation 405 indicates the waveform type selected by base station 405 forDPRS transmission—e.g., if the waveform type is not previously indicatedto UE 415. In some examples, the indication is transmitted controlchannel resources. In some example, base station 405 indicates a TCIstate for the DPRS transmission.

At arrow 455, base station 405 may perform a downlink transmission to UE415. The downlink transmission may include control signaling (e.g., aDCI message), data signaling (e.g., a data message), and one or morereference signals (e.g., CSI-RS).

At block 460, UE 415 may determine a configuration of a DPRS receivedfrom base station 405 based on a DPRS configuration indication receivedfrom base station 405 and/or characteristics of a downlink transmissionreceived from base station 405. In some examples, UE 415 may determineone or more transmission parameters (e.g., waveform type, numerology,multi-beam parameters, etc.) for the DPRS based on the indicationreceived from base station 405. For example, UE 415 may determine awaveform type used for the DPRS based on the received indication. UE 415may also determine one or more transmission parameters based ontransmission parameters used for other transmissions received in adownlink transmission. In some examples, UE 415 may determine a waveformtype used for the DPRS based on a waveform type used for a control,data, or reference signal included in the downlink transmission (or aprior downlink transmission). For example, UE 415 may determine that theDPRS is transmitted using a waveform type that matches a waveform typeused for a PDCCH signal, a PDSCH signal, or a CSI-RS included in theuplink transmission (or a prior uplink transmission).

In some examples, UE 415 may determine a numerology used for the DPRSbased on a numerology used to transmit a PDCCH signal in an activebandwidth part. In some examples, UE 415 may determine a numerology usedfor the DPRS based on a numerology used to transmit a PDSCH signal in anactive bandwidth part. Or UE 415 may determine a numerology used for theDPRS based on a numerology used to transmit a CSI-RS in an activebandwidth part. In some examples, multiple bandwidth parts are activeand the DPRS is transmitted over one of the active bandwidth parts. Insuch cases, UE 415 may determine that the DPRS uses a same numerology asa PDCCH signal, PDSCH signal, or CSI-RS signal transmitted in the samebandwidth part as the DPRS. In some examples, UE 415 and/or base station405 are able to model the non-linearity of the transmission componentsat base station 405 using the single DPRS. In other examples, multiplebandwidth parts are active and the DPRS is transmitted over multiple ofthe active bandwidth parts. In such cases, UE 415 may, for example,determine that a first DPRS uses a same numerology as a PDCCH signal,PDSCH signal, or CSI-RS signal transmitted in the first bandwidth partand a second DPRS uses a same numerology as a PDCCH signal, PDSCHsignal, or CSI-RS signal transmitted in a second bandwidth part.

UE 415 may also determine multi-beam characteristics of the DPRS. Insome examples, UE 415 determines multi-beam characteristics based on anSSB index previously indicated to base station 405. For example, UE 415may determine that a transmission spatial domain filter associated withthe SSB index is also used to transmit the DPRS. In such cases, UE 415may determine a QCL relationship between a synchronization signal blockhaving the SSB index and the DPRS. Additionally, or alternatively, UE415 may also determine QCL relationships between the DPRS and otherreference signals transmitted from base station 405. In some examples,UE 415 determines that the DPRS has a same QCL relationship with areference signal (e.g., a CSI-RS) as a QCL relationship between a PDCCHsignal and the reference signal. In some examples, UE 415 determinesthat the DPRS has a same QCL relationship with a reference signal (e.g.,a CSI-RS) as a QCL relationship between a PDSCH signal and the referencesignal. In other examples, UE 415 determines that DPRS has a QCLrelationship with a reference signal (e.g., a CSI-RS) based on a TCIstate that is explicitly signaled for the DPRS—the signaled TCI statemay be the same or different from a TCI state for a control and/or datasignal transmitted from base station 405.

At block 465, base station 405 may determine a model that describes anon-linear behavior of transmission components at UE 415 based on thetransmitted DPRS. In some examples, base station 405 may use thetransmitted DPRS to refine a neural network that is used to describe thenon-linear behavior of the transmission components. Base station 405 mayuse the neural network to generate an encoding scheme that may be usedby base station 405 to generate a downlink transmission and decodingscheme that may be used by UE 415 to decode a downlink transmissionreceived from base station 405 while avoiding and/or compensating fornon-linearities introduced by transmission components at base station405.

At block 470, UE 415 may determine a model that describes a non-linearbehavior of transmission components at base station 405 based on thetransmitted DPRS. In some examples, UE 415 may use the transmitted DPRSto refine a neural network that is used to describe the non-linearbehavior of the transmission components. UE 415 may use the neuralnetwork to generate an encoding scheme that may be used by base station405 to generate a downlink transmission and decoding scheme that may beused by UE 415 to decode a downlink transmission received from UE 415while avoiding and/or compensating for non-linearities introduced bytransmission components at base station 405.

FIG. 5 shows a block diagram 500 of a device 505 that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure. The device 505 may be an example ofaspects of a UE 115 or a base station 105 as described herein. Thedevice 505 may include a receiver 510, a transmitter 515, and acommunications manager 520. The device 505 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 510 may provide a means for receiving information such aspackets, user data, or control information associated with variousinformation channels (e.g., control channels, data channels, informationrelated to distortion probing reference signal configuration).Information may be passed on to other components of the device 505. Thereceiver 510 may utilize a single antenna or a plurality of antennas.

The transmitter 515 may provide a means for transmitting signalsgenerated by other components of the device 505. In some examples, thetransmitter 515 may be co-located with a receiver 510 in a transceivermodule. The transmitter 515 may utilize a single antenna or a pluralityof antennas.

The communications manager 520, the receiver 510, the transmitter 515,or various combinations thereof or various components thereof, may be anexample of a means for performing various aspects of distortion probingreference signal configuration as described herein.

In some examples, the communications manager 520, the receiver 510, thetransmitter 515, or various combinations thereof or components thereof,may be implemented in hardware (e.g., in communications managementcircuitry). The circuitry may include a processor, a digital signalprocessor (DSP), an application specific integrated circuit (ASIC), afield programmable gate array (FPGA) or other programmable logic device,discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described in thepresent disclosure.

Additionally, or alternatively, in some examples, the communicationsmanager 520, the receiver 510, the transmitter 515, or variouscombinations thereof or components thereof, may be implemented in code(e.g., as communications management software or firmware) executed by aprocessor. If implemented in code executed by a processor, the functionsof the communications manager 520, the receiver 510, the transmitter515, or various combinations thereof or components thereof, may beexecuted by a general-purpose processor, a DSP, a central processingunit (CPU), an ASIC, an FPGA, or some other programmable logic device.

In some examples, the communications manager 520 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 510, the transmitter515, or both.

The communications manager 520 may support wireless communication at atransmitting device in accordance with examples as disclosed herein. Forexample, the communications manager 520 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 520 may be configured toprovide or support a means for generating, basing at least in part onthe configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, wherein atransmission component at the transmitting device operates in anon-linear operating region based at least in part on thepeak-to-average power ratio. The communications manager 520 may beconfigured to provide or support a means for transmitting the generateddistortion probing reference signal, the distortion probing referencesignal associated with the peak-to-average power ratio.

The communications manager 520 may support wireless communication at areceiving device in accordance with examples as disclosed herein. Forexample, the communications manager 520 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 520 may be configured toprovide or support a means for receiving, based at least in part on theconfiguration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal comprisinga peak-to-average power ratio associated with a non-linear operatingregion of a transmitting component. The communications manager 520 maybe configured to provide or support a means for determining a non-linearresponse of a transmission component of the transmitting device based atleast in part on the distortion probing reference signal.

FIG. 6 shows a block diagram 600 of a device 605 that supportsconfiguring a distortion probing reference signal in accordance withaspects of the present disclosure. The device 605 may be an example ofaspects of a device 505, a UE 115, or a base station 105 as describedherein. The device 605 may include a receiver 610, a transmitter 615,and a communications manager 620. The device 605 may also include aprocessor. Each of these components may be in communication with oneanother (e.g., via one or more buses).

The receiver 610 may provide a means for receiving information such aspackets, user data, or control information associated with variousinformation channels (e.g., control channels, data channels, informationrelated to distortion probing reference signal configuration).Information may be passed on to other components of the device 605. Thereceiver 610 may utilize a single antenna or a plurality of antennas.

The transmitter 615 may provide a means for transmitting signalsgenerated by other components of the device 605. In some examples, thetransmitter 615 may be co-located with a receiver 610 in a transceivermodule. The transmitter 615 may utilize a single antenna or a pluralityof antennas.

The device 605, or various components thereof, may be an example ofmeans for performing various aspects of distortion probing referencesignal configuration as described herein. For example, thecommunications manager 620 may include an DPRS configuration component625, an DPRS generation component 630, an DPRS transmission component635, an DPRS reception component 640, a non-linear estimation component645, or any combination thereof. The communications manager 620 may bean example of aspects of a communications manager 520 as describedherein. In some examples, the communications manager 620, or variouscomponents thereof, may be configured to perform various operations(e.g., receiving, monitoring, transmitting) using or otherwise incooperation with the receiver 610, the transmitter 615, or both.

The communications manager 620 may support wireless communication at atransmitting device in accordance with examples as disclosed herein. TheDPRS configuration component 625 may be configured to provide or supporta means for determining a configuration for a distortion probingreference signal. The DPRS generation component 630 may be configured toprovide or support a means for generating, based on the configuration,the distortion probing reference signal using a sequence associated witha peak-to-average power ratio, where a transmission component at thetransmitting device operates in a non-linear operating region based onthe peak-to-average power ratio. The DPRS transmission component 635 maybe configured to provide or support a means for transmitting thegenerated distortion probing reference signal, the distortion probingreference signal associated with the peak-to-average power ratio.

The communications manager 620 may support wireless communication at areceiving device in accordance with examples as disclosed herein.Additionally, or alternatively, the DPRS configuration component 625 maybe configured to provide or support a means for determining aconfiguration for a distortion probing reference signal. The DPRSreception component 640 may be configured to provide or support a meansfor receiving, based on the configuration, the distortion probingreference signal from a transmitting device, the distortion probingreference signal including a peak-to-average power ratio associated witha non-linear operating region of a transmitting component. Thenon-linear estimation component 645 may be configured to provide orsupport a means for determining a non-linear response of a transmissioncomponent of the transmitting device based on the distortion probingreference signal.

FIG. 7 shows a block diagram 700 of a communications manager 720 thatsupports configuring a distortion probing reference signal in accordancewith aspects of the present disclosure. The communications manager 720may be an example of aspects of a communications manager 520, acommunications manager 620, or both, as described herein. Thecommunications manager 720, or various components thereof, may be anexample of means for performing various aspects of distortion probingreference signal configuration as described herein. For example, thecommunications manager 720 may include an DPRS configuration component725, an DPRS generation component 730, an DPRS transmission component735, an DPRS reception component 740, a non-linear estimation component745, a bandwidth part component 750, or any combination thereof. Each ofthese components may communicate, directly or indirectly, with oneanother (e.g., via one or more buses).

The communications manager 720 may support wireless communication at atransmitting device in accordance with examples as disclosed herein. TheDPRS configuration component 725 may be configured to provide or supporta means for determining a configuration for a distortion probingreference signal. The DPRS generation component 730 may be configured toprovide or support a means for generating, based on the configuration,the distortion probing reference signal using a sequence associated witha peak-to-average power ratio, where a transmission component at thetransmitting device operates in a non-linear operating region based onthe peak-to-average power ratio. The DPRS transmission component 735 maybe configured to provide or support a means for transmitting thegenerated distortion probing reference signal, the distortion probingreference signal associated with the peak-to-average power ratio.

In some examples, the non-linear estimation component 745 may beconfigured to provide or support a means for determining a non-linearresponse of the transmission component based on the distortion probingreference signal.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for receiving an indication of a waveformtype for the distortion probing reference signal, where theconfiguration for the distortion probing reference signal is based onthe waveform type.

In some examples, the indication of the waveform type is received in asystem information message, a medium access control channel element, adownlink control information message, a radio resource control message,a random access channel message, or any combination thereof.

In some examples, the DPRS generation component 730 may be configured toprovide or support a means for selecting a waveform type for thedistortion probing reference signal, where the configuration for thedistortion probing reference signal is based on the waveform type. Insome examples, the DPRS transmission component 735 may be configured toprovide or support a means for indicating, to a receiving device, thewaveform type selected by the transmitting device.

In some examples, to indicate the waveform type, the DPRS transmissioncomponent 735 may be configured to provide or support a means fortransmitting an indication of the waveform type in a system informationmessage, a medium access control channel element, a downlink controlinformation message, a radio resource control message, a random accesschannel message, or any combination thereof

In some examples, to indicate the waveform type, the DPRS transmissioncomponent 735 may be configured to provide or support a means fortransmitting an indication of the waveform type in a random accesschannel message, an uplink control information message, or anycombination thereof.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first waveform type forsignals transmitted using a data channel, a second waveform type forsignals transmitted using a control channel, or both, where theconfiguration for the distortion probing reference signal is based onthe first waveform type or the second waveform type.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first numerology forsignals transmitted using a data channel in a bandwidth part, a secondnumerology for signals transmitted using a control channel in thebandwidth part, a third numerology for reference signals transmitted inthe bandwidth part, or any combination thereof, where the configurationfor the distortion probing reference signal is based on the firstnumerology, the second numerology, or the third.

In some examples, the bandwidth part component 750 may be configured toprovide or support a means for activating a first bandwidth part and asecond bandwidth part for communications. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a first numerology for signals transmitted using adata channel in the first bandwidth part, a second numerology forsignals transmitted using a control channel in the first bandwidth part,a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof, where the configuration forthe distortion probing reference signal is based on the firstnumerology, the second numerology, or the third numerology, and thedistortion probing reference signal is transmitted in the firstbandwidth part.

In some examples, the first numerology associated with the firstbandwidth part is different from the second numerology associated withthe second bandwidth part.

In some examples, the bandwidth part component 750 may be configured toprovide or support a means for activating a first bandwidth part and asecond bandwidth part for communications. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a first numerology for signals transmitted using adata channel in the first bandwidth part, a second numerology forsignals transmitted using a control channel in the first bandwidth part,a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a fourth numerology for signals transmitted usingthe data channel in the second bandwidth part, a fifth numerology forsignals transmitted using the control channel in the second bandwidthpart, a sixth numerology for reference signals transmitted in the secondbandwidth part, or any combination thereof. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for where the configuration for the distortion probing referencesignal is based on the first numerology, the second numerology, thethird numerology, the fourth numerology, the fifth numerology, or thesixth numerology. In some examples, the DPRS transmission component 735may be configured to provide or support a means for where transmittingthe distortion probing reference signal includes transmitting a firstcomponent of the distortion probing reference signal based on the firstnumerology, the second numerology, or the third numerology fortransmission in the first bandwidth part, and transmitting a secondcomponent of the distortion probing reference signal based on the fourthnumerology, the fifth numerology, or the sixth numerology fortransmission in the second bandwidth part.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a synchronization signalblock index configured for a receiving device, where the configurationfor the distortion probing reference signal is based on thesynchronization signal block index and the distortion probing referencesignal is transmitted using a transmission spatial domain filtercorresponding to the synchronization signal block index.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first correspondencebetween a control channel and a first reference signal, a secondcorrespondence between a data channel and a second reference signal, orboth based on a transmission configuration indicator.

In some examples, the DPRS transmission component 735 may be configuredto provide or support a means for indicating, to a receiving device,that the first reference signal corresponds to the distortion probingreference signal based on the first correspondence between the controlchannel and the first reference signal. In some examples, the DPRStransmission component 735 may be configured to provide or support ameans for indicating, to the receiving device, that the second referencesignal corresponds to the distortion probing reference signal based onthe second correspondence between the data channel and the secondreference signal.

In some examples, the DPRS transmission component 735 may be configuredto provide or support a means for indicating, to a receiving device, athird correspondence between the distortion probing reference signal anda third reference signal.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first set of spatialfiltering coefficients for signals transmitted using a data channel, asecond set of spatial filtering coefficients for signals transmittedusing a control channel, or both, where the configuration for thedistortion probing reference signal is based on the first set of spatialfiltering coefficients or the second set of spatial filteringcoefficients.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a set of one or morespatial filtering coefficients for signals transmitted using a randomaccess channel, where the configuration for the distortion probingreference signal is based on the set of spatial filtering coefficients.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for receiving an indication of a set ofone or more spatial filtering coefficients for the distortion probingreference signal, where the configuration for the distortion probingreference signal is based on the set of spatial filtering coefficients.

The communications manager 720 may support wireless communication at areceiving device in accordance with examples as disclosed herein. Insome examples, the DPRS configuration component 725 may be configured toprovide or support a means for determining a configuration for adistortion probing reference signal. The DPRS reception component 740may be configured to provide or support a means for receiving, based onthe configuration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal including apeak-to-average power ratio associated with a non-linear operatingregion of a transmitting component. The non-linear estimation component745 may be configured to provide or support a means for determining anon-linear response of a transmission component of the transmittingdevice based on the distortion probing reference signal.

In some examples, the DPRS reception component 740 may be configured toprovide or support a means for transmitting an indication of a waveformtype for the distortion probing reference signal, where theconfiguration for the distortion probing reference signal is based onthe waveform type.

In some examples, the DPRS reception component 740 may be configured toprovide or support a means for receiving an indication of a waveformtype for the distortion probing reference signal, where theconfiguration for the distortion probing reference signal is based onthe waveform type.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first waveform type forsignals transmitted using a data channel, a second waveform type forsignals transmitted using a control channel, or both, where theconfiguration for the distortion probing reference signal is based onthe first waveform type or the second waveform type.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first numerology forsignals transmitted using a data channel in a bandwidth part, a secondnumerology for signals transmitted using a control channel in thebandwidth part, a third numerology for reference signals transmitted inthe bandwidth part, or any combination thereof, where the configurationfor the distortion probing reference signal is based on the firstnumerology, the second numerology, or the third numerology.

In some examples, the bandwidth part component 750 may be configured toprovide or support a means for activating a first bandwidth part and asecond bandwidth part for communications. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a first numerology for signals transmitted using adata channel in the first bandwidth part, a second numerology forsignals transmitted using a control channel in the first bandwidth part,a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof, where the configuration forthe distortion probing reference signal is based on the firstnumerology, the second numerology, or the third numerology, and thedistortion probing reference signal is received in the first bandwidthpart.

In some examples, the bandwidth part component 750 may be configured toprovide or support a means for activating a first bandwidth part and asecond bandwidth part for communications. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a first numerology for signals transmitted using adata channel in the first bandwidth part, a second numerology forsignals transmitted using a control channel in the first bandwidth part,a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof. In some examples, the DPRSconfiguration component 725 may be configured to provide or support ameans for determining a fourth numerology for signals transmitted usingthe data channel in the second bandwidth part, a fifth numerology forsignals transmitted using the control channel in the second bandwidthpart, a sixth numerology for reference signals transmitted in the secondbandwidth part, or any combination thereof, where the configuration forthe distortion probing reference signal is based on the firstnumerology, the second numerology, the third numerology, the fourthnumerology, the fifth numerology, or the sixth numerology.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for identifying a synchronization signalblock index corresponding to a transmission spatial domain filter. Insome examples, the DPRS reception component 740 may be configured toprovide or support a means for where the distortion probing referencesignal is received based on a quasi-colocation between signalstransmitted during the synchronization signal block index and thedistortion probing reference signal.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first correspondencebetween a control channel and a first reference signal, a secondcorrespondence between a data channel and a second reference signal, orboth based on a transmission configuration indicator.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining that the first referencesignal corresponds to the distortion probing reference signal based onthe first correspondence between the control channel and the firstreference signal. In some examples, the DPRS configuration component 725may be configured to provide or support a means for determining that thesecond reference signal corresponds to the distortion probing referencesignal based on the second correspondence between the data channel andthe first reference signal.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for receiving an indication of a thirdcorrespondence between the distortion probing reference signal and athird reference signal.

In some examples, the DPRS configuration component 725 may be configuredto provide or support a means for determining a first set of spatialfiltering coefficients for signals transmitted using a data channel, asecond set of spatial filtering coefficients for signals transmittedusing a control channel, a third set of spatial filtering coefficientsfor signal transmitted using a random access channel, or any combinationthereof, where the configuration for the distortion probing referencesignal is based on the first set of spatial filtering coefficients, thesecond set of spatial filtering coefficients, or the third set ofspatial filtering coefficients.

In some examples, the DPRS reception component 740 may be configured toprovide or support a means for indicating a set of one or more spatialfiltering coefficients for the distortion probing reference signal,where the configuration for the distortion probing reference signal isbased on the set of spatial filtering coefficients.

FIG. 8 shows a diagram of a system 800 including a device 805 thatsupports configuring a distortion probing reference signal in accordancewith aspects of the present disclosure. The device 805 may be an exampleof or include the components of device 605 or a UE 115 as describedherein. The device 805 may communicate wirelessly with one or more basestations 105, UEs 115, or any combination thereof. The device 805 mayinclude components for bi-directional voice and data communicationsincluding components for transmitting and receiving communications,including a communications manager 810, a I/O controller 815, atransceiver 820, an antenna 825, a memory 830, a code 835, and aprocessor 840. These components may be in electronic communication orotherwise coupled (e.g., operatively, communicatively, functionally,electronically, electrically) via one or more buses (e.g., bus 845).

The I/O controller 815 may manage input and output signals for device805. The I/O controller 815 may also manage peripherals not integratedinto device 805. In some cases, the I/o controller 815 may represent aphysical connection or port to an external peripheral. In some cases,the I/O controller 815 may utilize an operating system such as iOS®,ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another knownoperating system. In other cases, the I/O controller 815 may representor interact with a modem, a keyboard, a mouse, a touchscreen, or asimilar device. In some cases, the I/O controller 815 may be implementedas part of a processor. In some cases, a user may interact with device805 via the I/O controller 815 or via hardware components controlled bythe I/O controller 815.

In some cases, the device 805 may include a single antenna 825. However,in some cases the device may have more than one antenna 825, which maybe capable of concurrently transmitting or receiving multiple wirelesstransmissions. The transceiver 820 may communicate bi-directionally, viathe one or more antennas 825, wired, or wireless links as describedherein. For example, the transceiver 820 may represent a wirelesstransceiver and may communicate bi-directionally with another wirelesstransceiver. The transceiver 820 may also include a modem to modulatethe packets and provide the modulated packets to one or more antennas825 for transmission, and to demodulate packets received from the one ormore antennas 825. The transceiver 820, or the transceiver 820 and oneor more antennas 825, may be an example of a transmitter 515, atransmitter 615, a receiver 510, a receiver 610, or any combinationthereof or component thereof, as described herein.

The memory 830 may include random-access memory (RAM) and read-onlymemory (ROM). The memory 830 may store computer-readable,computer-executable code 835 including instructions that, when executedby the processor 840, cause the device 805 to perform various functionsdescribed herein. The code 835 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 835 may not be directly executable by theprocessor 840 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein. In some cases, thememory 830 may contain, among other things, a basic input/output system(BIOS) which may control basic hardware or software operation such asthe interaction with peripheral components or devices.

The processor 840 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 840 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 840. The processor 840 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 830) to cause the device 805 to perform variousfunctions (e.g., functions or tasks supporting distortion probingreference signal configuration).

The communications manager 810 may support wireless communication at atransmitting device in accordance with examples as disclosed herein. Forexample, the communications manager 810 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 810 may be configured toprovide or support a means for generating, basing at least in part onthe configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, where atransmission component at the transmitting device operates in anon-linear operating region based on the peak-to-average power ratio.The communications manager 810 may be configured to provide or support ameans for transmitting the generated distortion probing referencesignal, the distortion probing reference signal associated with thepeak-to-average power ratio.

The communications manager 810 may support wireless communication at areceiving device in accordance with examples as disclosed herein. Forexample, the communications manager 810 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 810 may be configured toprovide or support a means for receiving, based on the configuration,the distortion probing reference signal from a transmitting device, thedistortion probing reference signal including a peak-to-average powerratio associated with a non-linear operating region of a transmittingcomponent. The communications manager 810 may be configured to provideor support a means for determining a non-linear response of atransmission component of the transmitting device based on thedistortion probing reference signal.

By including or configuring the communications manager 810 in accordancewith examples as described herein, the device 805 may support improvedtechniques for determining a non-linear response of transmissioncomponents at the device 805 or another device, enabling increasedutilization of transmission components at the device 805 or otherdevice.

In some examples, the communications manager 810 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 820, the one ormore antennas 825, or any combination thereof. Although thecommunications manager 810 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 810 may be supported by or performed by theprocessor 840, the memory 830, the code 835, or any combination thereof.For example, the code 835 may include instructions executable by theprocessor 840 to cause the device 805 to perform various aspects ofdistortion probing reference signal configuration as described herein,or the processor 840 and the memory 830 may be otherwise configured toperform or support such operations.

FIG. 9 shows a diagram of a system 900 including a device 905 thatsupports configuring a distortion probing reference signal in accordancewith aspects of the present disclosure. The device 905 may be an exampleof or include the components of device 605 or a base station 105 asdescribed herein. The device 905 may communicate wirelessly with one ormore base stations 105, UEs 115, or any combination thereof. The device905 may include components for bi-directional voice and datacommunications including components for transmitting and receivingcommunications, including a communications manager 910, a networkcommunications manager 915, a transceiver 920, an antenna 925, a memory930, a code 935, a processor 940, and an inter-station communicationsmanager 945. These components may be in electronic communication orotherwise coupled (e.g., operatively, communicatively, functionally,electronically, electrically) via one or more buses (e.g., bus 950).

The network communications manager 915 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 915 may manage the transferof data communications for client devices, such as one or more UEs 115.

In some cases, the device 905 may include a single antenna 925. However,in some cases the device may have more than one antenna 925, which maybe capable of concurrently transmitting or receiving multiple wirelesstransmissions. The transceiver 920 may communicate bi-directionally, viathe one or more antennas 925, wired, or wireless links as describedherein. For example, the transceiver 920 may represent a wirelesstransceiver and may communicate bi-directionally with another wirelesstransceiver. The transceiver 920 may also include a modem to modulatethe packets and provide the modulated packets to one or more antennas925 for transmission, and to demodulate packets received from the one ormore antennas 925. The transceiver 920, or the transceiver 920 and oneor more antennas 925, may be an example of a transmitter 515, atransmitter 615, a receiver 510, a receiver 610, or any combinationthereof or component thereof, as described herein.

The memory 930 may include RAM and ROM. The memory 930 may storecomputer-readable, computer-executable code 935 including instructionsthat, when executed by the processor 940, cause the device 905 toperform various functions described herein. The code 935 may be storedin a non-transitory computer-readable medium such as system memory orother type of memory. In some cases, the code 935 may not be directlyexecutable by the processor 940 but may cause a computer (e.g., whencompiled and executed) to perform functions described herein. In somecases, the memory 930 may contain, among other things, a BIOS which maycontrol basic hardware or software operation such as the interactionwith peripheral components or devices.

The processor 940 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 940 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 940. The processor 940 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 930) to cause the device 905 to perform variousfunctions (e.g., functions or tasks supporting distortion probingreference signal configuration).

The inter-station communications manager 945 may manage communicationswith other base station 105 and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager945 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager945 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The communications manager 910 may support wireless communication at atransmitting device in accordance with examples as disclosed herein. Forexample, the communications manager 910 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 910 may be configured toprovide or support a means for generating, basing at least in part onthe configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, where atransmission component at the transmitting device operates in anon-linear operating region based on the peak-to-average power ratio.The communications manager 910 may be configured to provide or support ameans for transmitting the generated distortion probing referencesignal, the distortion probing reference signal associated with thepeak-to-average power ratio.

The communications manager 910 may support wireless communication at areceiving device in accordance with examples as disclosed herein. Forexample, the communications manager 910 may be configured to provide orsupport a means for determining a configuration for a distortion probingreference signal. The communications manager 910 may be configured toprovide or support a means for receiving, based on the configuration,the distortion probing reference signal from a transmitting device, thedistortion probing reference signal including a peak-to-average powerratio associated with a non-linear operating region of a transmittingcomponent. The communications manager 910 may be configured to provideor support a means for determining a non-linear response of atransmission component of the transmitting device based on thedistortion probing reference signal.

By including or configuring the communications manager 910 in accordancewith examples as described herein, the device 905 may support improvedtechniques for the device 805 may support improved techniques fordetermining a non-linear response of transmission components at thedevice 905 or another device, enabling increased utilization oftransmission components at the device 905 or other device.

In some examples, the communications manager 910 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 920, the one ormore antennas 925, or any combination thereof. Although thecommunications manager 910 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 910 may be supported by or performed by theprocessor 940, the memory 930, the code 935, or any combination thereof.For example, the code 935 may include instructions executable by theprocessor 940 to cause the device 905 to perform various aspects ofdistortion probing reference signal configuration as described herein,or the processor 940 and the memory 930 may be otherwise configured toperform or support such operations.

FIG. 10 shows a flowchart illustrating a method 1000 for distortionprobing reference signal configuration in accordance with aspects of thepresent disclosure. The operations of method 1000 may be implemented bya UE or a base station or its components as described herein. Forexample, the operations of method 1000 may be performed by a UE 115 or abase station 105 as described with reference to FIGS. 1 through 9 . Insome examples, a UE or a base station may execute a set of instructionsto control the functional elements of the device to perform thedescribed functions. Additionally, or alternatively, the UE or the basestation may perform aspects of the described functions usingspecial-purpose hardware.

At 1005, the method may include determining a configuration for adistortion probing reference signal. The operations of 1005 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1005 may be performed by an DPRSconfiguration component 725 as described with reference to FIG. 7 .

At 1010, the method may include generating, based at least in part onthe configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, wherein atransmission component at the transmitting device operates in anon-linear operating region based at least in part on thepeak-to-average power ratio. The operations of 1010 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1010 may be performed by an DPRS generation component730 as described with reference to FIG. 7 .

At 1015, the method may include transmitting the generated distortionprobing reference signal, the distortion probing reference signalassociated with the peak-to-average power ratio. The operations of 1015may be performed according to the methods described herein. In someexamples, aspects of the operations of 1015 may be performed by an DPRStransmission component 735 as described with reference to FIG. 7 .

FIG. 11 shows a flowchart illustrating a method 1100 for distortionprobing reference signal configuration in accordance with aspects of thepresent disclosure. The operations of method 1100 may be implemented bya UE or a base station or its components as described herein. Forexample, the operations of method 1100 may be performed by a UE 115 or abase station 105 as described with reference to FIGS. 1 through 9 . Insome examples, a UE or a base station may execute a set of instructionsto control the functional elements of the device to perform thedescribed functions. Additionally, or alternatively, the UE or the basestation may perform aspects of the described functions usingspecial-purpose hardware.

At 1105, the method may include determining a configuration for adistortion probing reference signal. The operations of 1105 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1105 may be performed by an DPRSconfiguration component 725 as described with reference to FIG. 7 .

At 1110, the method may include receiving, based at least in part on theconfiguration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal comprisinga peak-to-average power ratio associated with a non-linear operatingregion of a transmitting component. The operations of 1110 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1110 may be performed by an DPRS receptioncomponent 740 as described with reference to FIG. 7 .

At 1115, the method may include determining a non-linear response of atransmission component of the transmitting device based at least in parton the distortion probing reference signal. The operations of 1115 maybe performed according to the methods described herein. In someexamples, aspects of the operations of 1115 may be performed by anon-linear estimation component 745 as described with reference to FIG.7 .

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication at a transmitting device,comprising: determining a configuration for a distortion probingreference signal; generating, based at least in part on theconfiguration, the distortion probing reference signal using a sequenceassociated with a peak-to-average power ratio, wherein a transmissioncomponent at the transmitting device operates in a non-linear operatingregion based at least in part on the peak-to-average power ratio;transmitting the generated distortion probing reference signal, thedistortion probing reference signal associated with the peak-to-averagepower ratio.

Aspect 2: The method of aspect 1, further comprising: determining anon-linear response of the transmission component based at least in parton the distortion probing reference signal.

Aspect 3: The method of any of aspects 1 through 2, further comprising:receiving an indication of a waveform type for the distortion probingreference signal, wherein the configuration for the distortion probingreference signal is based at least in part on the waveform type.

Aspect 4: The method of aspect 3, wherein the indication of the waveformtype is received in a system information message, a medium accesscontrol channel element, a downlink control information message, a radioresource control message, a random access channel message, or anycombination thereof.

Aspect 5: The method of any of aspects 1 through 4, further comprising:selecting a waveform type for the distortion probing reference signal,wherein the configuration for the distortion probing reference signal isbased at least in part on the waveform type; and indicating, to areceiving device, the waveform type selected by the transmitting device.

Aspect 6: The method of aspect 5, wherein indicating the waveform typecomprises: transmitting an indication of the waveform type in a systeminformation message, a medium access control channel element, a downlinkcontrol information message, a radio resource control message, a randomaccess channel message, or any combination thereof.

Aspect 7: The method of any of aspects 5 through 6, wherein indicatingthe waveform type comprises: transmitting an indication of the waveformtype in a random access channel message, an uplink control informationmessage, or any combination thereof.

Aspect 8: The method of any of aspects 1 through 7, further comprising:determining a first waveform type for signals transmitted using a datachannel, a second waveform type for signals transmitted using a controlchannel, or both, wherein the configuration for the distortion probingreference signal is based at least in part on the first waveform type orthe second waveform type.

Aspect 9: The method of any of aspects 1 through 7, further comprising:determining a first numerology for signals transmitted using a datachannel in a bandwidth part, a second numerology for signals transmittedusing a control channel in the bandwidth part, a third numerology forreference signals transmitted in the bandwidth part, or any combinationthereof, wherein the configuration for the distortion probing referencesignal is based at least in part on the first numerology, the secondnumerology, or the third.

Aspect 10: The method of any of aspects 1 through 7, further comprising:activating a first bandwidth part and a second bandwidth part forcommunications; and determining a first numerology for signalstransmitted using a data channel in the first bandwidth part, a secondnumerology for signals transmitted using a control channel in the firstbandwidth part, a third numerology for reference signals transmitted inthe first bandwidth part, or any combination thereof, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the first numerology, the second numerology, or thethird numerology, and the distortion probing reference signal istransmitted in the first bandwidth part.

Aspect 11: The method of aspect 10, wherein the first numerologyassociated with the first bandwidth part is different from the secondnumerology associated with the second bandwidth part.

Aspect 12: The method of any of aspects 1 through 11, furthercomprising: activating a first bandwidth part and a second bandwidthpart for communications; determining a first numerology for signalstransmitted using a data channel in the first bandwidth part, a secondnumerology for signals transmitted using a control channel in the firstbandwidth part, a third numerology for reference signals transmitted inthe first bandwidth part, or any combination thereof; and determining afourth numerology for signals transmitted using the data channel in thesecond bandwidth part, a fifth numerology for signals transmitted usingthe control channel in the second bandwidth part, a sixth numerology forreference signals transmitted in the second bandwidth part, or anycombination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, the third numerology, the fourthnumerology, the fifth numerology, or the sixth numerology, and whereintransmitting the distortion probing reference signal comprisestransmitting a first component of the distortion probing referencesignal based at least in part on the first numerology, the secondnumerology, or the third numerology for transmission in the firstbandwidth part, and transmitting a second component of the distortionprobing reference signal based at least in part on the fourthnumerology, the fifth numerology, or the sixth numerology fortransmission in the second bandwidth part.

Aspect 13: The method of any of aspects 1 through 12, furthercomprising: determining a synchronization signal block index configuredfor a receiving device, wherein the configuration for the distortionprobing reference signal is based at least in part on thesynchronization signal block index and the distortion probing referencesignal is transmitted using a transmission spatial domain filtercorresponding to the synchronization signal block index.

Aspect 14: The method of any of aspects 1 through 13, furthercomprising: determining a first correspondence between a control channeland a first reference signal, a second correspondence between a datachannel and a second reference signal, or both based at least in part ona transmission configuration indicator.

Aspect 15: The method of aspect 14, further comprising: indicating, to areceiving device, that the first reference signal corresponds to thedistortion probing reference signal based at least in part on the firstcorrespondence between the control channel and the first referencesignal; or indicating, to the receiving device, that the secondreference signal corresponds to the distortion probing reference signalbased at least in part on the second correspondence between the datachannel and the second reference signal.

Aspect 16: The method of any of aspects 14 through 15, furthercomprising: indicating, to a receiving device, a third correspondencebetween the distortion probing reference signal and a third referencesignal.

Aspect 17: The method of any of aspects 1 through 16, furthercomprising: determining a first set of spatial filtering coefficientsfor signals transmitted using a data channel, a second set of spatialfiltering coefficients for signals transmitted using a control channel,or both, wherein the configuration for the distortion probing referencesignal is based at least in part on the first set of spatial filteringcoefficients or the second set of spatial filtering coefficients.

Aspect 18: The method of any of aspects 1 through 17, furthercomprising: determining a set of one or more spatial filteringcoefficients for signals transmitted using a random access channel,wherein the configuration for the distortion probing reference signal isbased at least in part on the set of spatial filtering coefficients.

Aspect 19: The method of any of aspects 1 through 18, furthercomprising: receiving an indication of a set of one or more spatialfiltering coefficients for the distortion probing reference signal,wherein the configuration for the distortion probing reference signal isbased at least in part on the set of spatial filtering coefficients.

Aspect 20: A method for wireless communication at a receiving device,comprising: determining a configuration for a distortion probingreference signal; receiving, based at least in part on theconfiguration, the distortion probing reference signal from atransmitting device, the distortion probing reference signal comprisinga peak-to-average power ratio associated with a non-linear operatingregion of a transmitting component; and determining a non-linearresponse of a transmission component of the transmitting device based atleast in part on the distortion probing reference signal.

Aspect 21: The method of aspect 20, further comprising: transmitting anindication of a waveform type for the distortion probing referencesignal, wherein the configuration for the distortion probing referencesignal is based at least in part on the waveform type.

Aspect 22: The method of any of aspects 20 through 21, furthercomprising: receiving an indication of a waveform type for thedistortion probing reference signal, wherein the configuration for thedistortion probing reference signal is based at least in part on thewaveform type.

Aspect 23: The method of any of aspects 20 through 22, furthercomprising: determining a first waveform type for signals transmittedusing a data channel, a second waveform type for signals transmittedusing a control channel, or both, wherein the configuration for thedistortion probing reference signal is based at least in part on thefirst waveform type or the second waveform type.

Aspect 24: The method of any of aspects 20 through 23, furthercomprising: determining a first numerology for signals transmitted usinga data channel in a bandwidth part, a second numerology for signalstransmitted using a control channel in the bandwidth part, a thirdnumerology for reference signals transmitted in the bandwidth part, orany combination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, or the third numerology.

Aspect 25: The method of any of aspects 20 through 24, furthercomprising: activating a first bandwidth part and a second bandwidthpart for communications; and determining a first numerology for signalstransmitted using a data channel in the first bandwidth part, a secondnumerology for signals transmitted using a control channel in the firstbandwidth part, a third numerology for reference signals transmitted inthe first bandwidth part, or any combination thereof, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the first numerology, the second numerology, or thethird numerology, and the distortion probing reference signal isreceived in the first bandwidth part.

Aspect 26: The method of any of aspects 20 through 25, furthercomprising: activating a first bandwidth part and a second bandwidthpart for communications; determining a first numerology for signalstransmitted using a data channel in the first bandwidth part, a secondnumerology for signals transmitted using a control channel in the firstbandwidth part, a third numerology for reference signals transmitted inthe first bandwidth part, or any combination thereof; and determining afourth numerology for signals transmitted using the data channel in thesecond bandwidth part, a fifth numerology for signals transmitted usingthe control channel in the second bandwidth part, a sixth numerology forreference signals transmitted in the second bandwidth part, or anycombination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, the third numerology, the fourthnumerology, the fifth numerology, or the sixth numerology.

Aspect 27: The method of any of aspects 20 through 26, furthercomprising: identifying a synchronization signal block indexcorresponding to a transmission spatial domain filter; wherein thedistortion probing reference signal is received based at least in parton a quasi-colocation between signals transmitted during thesynchronization signal block index and the distortion probing referencesignal.

Aspect 28: The method of any of aspects 20 through 27, furthercomprising: determining a first correspondence between a control channeland a first reference signal, a second correspondence between a datachannel and a second reference signal, or both based at least in part ona transmission configuration indicator.

Aspect 29: The method of aspect 28, further comprising: determining thatthe first reference signal corresponds to the distortion probingreference signal based at least in part on the first correspondencebetween the control channel and the first reference signal; ordetermining that the second reference signal corresponds to thedistortion probing reference signal based at least in part on the secondcorrespondence between the data channel and the first reference signal.

Aspect 30: The method of any of aspects 28 through 29, furthercomprising: receiving an indication of a third correspondence betweenthe distortion probing reference signal and a third reference signal.

Aspect 31: The method of any of aspects 20 through 30, furthercomprising: determining a first set of spatial filtering coefficientsfor signals transmitted using a data channel, a second set of spatialfiltering coefficients for signals transmitted using a control channel,a third set of spatial filtering coefficients for signal transmittedusing a random access channel, or any combination thereof, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the first set of spatial filtering coefficients, thesecond set of spatial filtering coefficients, or the third set ofspatial filtering coefficients.

Aspect 32: The method of any of aspects 20 through 31, furthercomprising: indicating a set of one or more spatial filteringcoefficients for the distortion probing reference signal, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the set of spatial filtering coefficients.

Aspect 33: An apparatus for wireless communication at a transmittingdevice, comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 1 through 19.

Aspect 34: An apparatus for wireless communication at a transmittingdevice, comprising at least one means for performing a method of any ofaspects 1 through 19.

Aspect 35: A non-transitory computer-readable medium storing code forwireless communication at a transmitting device, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 1 through 19.

Aspect 36: An apparatus for wireless communication at a receivingdevice, comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 20 through 32.

Aspect 37: An apparatus for wireless communication at a receivingdevice, comprising at least one means for performing a method of any ofaspects 20 through 32.

Aspect 38: A non-transitory computer-readable medium storing code forwireless communication at a receiving device, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 20 through 32.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may bedescribed for purposes of example, and LTE, LTE-A, LTE-A Pro, or NRterminology may be used in much of the description, the techniquesdescribed herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NRnetworks. For example, the described techniques may be applicable tovarious other wireless communications systems such as Ultra MobileBroadband (UMB), Institute of Electrical and Electronics Engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, aswell as other systems and radio technologies not explicitly mentionedherein.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connectionwith the disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, a CPU, an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyprocessor, controller, microcontroller, or state machine. A processormay also be implemented as a combination of computing devices (e.g., acombination of a DSP and a microprocessor, multiple microprocessors, oneor more microprocessors in conjunction with a DSP core, or any othersuch configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein may be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that may beaccessed by a general-purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable read-only memory(EEPROM), flash memory, compact disk read only memory (CD-ROM) or otheroptical disk storage, magnetic disk storage or other magnetic storagedevices, or any other non-transitory medium that may be used to carry orstore desired program code means in the form of instructions or datastructures and that may be accessed by a general-purpose orspecial-purpose computer, or a general-purpose or special-purposeprocessor. Also, any connection is properly termed a computer-readablemedium. For example, if the software is transmitted from a website,server, or other remote source using a coaxial cable, fiber optic cable,twisted pair, digital subscriber line (DSL), or wireless technologiessuch as infrared, radio, and microwave, then the coaxial cable, fiberoptic cable, twisted pair, DSL, or wireless technologies such asinfrared, radio, and microwave are included in the definition ofcomputer-readable medium. Disk and disc, as used herein, include CD,laser disc, optical disc, digital versatile disc (DVD), floppy disk andBlu-ray disc where disks usually reproduce data magnetically, whilediscs reproduce data optically with lasers. Combinations of the aboveare also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an example step that is described as “based on condition A”may be based on both a condition A and a condition B without departingfrom the scope of the present disclosure. In other words, as usedherein, the phrase “based on” shall be construed in the same manner asthe phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “example” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, known structures and devices are shown inblock diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person having ordinaryskill in the art to make or use the disclosure. Various modifications tothe disclosure will be apparent to a person having ordinary skill in theart, and the generic principles defined herein may be applied to othervariations without departing from the scope of the disclosure. Thus, thedisclosure is not limited to the examples and designs described hereinbut is to be accorded the broadest scope consistent with the principlesand novel features disclosed herein.

What is claimed is:
 1. An apparatus for wireless communication at atransmitting device, comprising: a processor; memory coupled with theprocessor; and instructions stored in the memory and executable by theprocessor to cause the apparatus to: determine a configuration for adistortion probing reference signal; generate, based at least in part onthe configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, wherein atransmission component at the transmitting device operates in anon-linear operating region based at least in part on thepeak-to-average power ratio; and transmit the generated distortionprobing reference signal, the distortion probing reference signalassociated with the peak-to-average power ratio.
 2. The apparatus ofclaim 1, wherein the instructions are further executable by theprocessor to cause the apparatus to: determine a non-linear response ofthe transmission component based at least in part on the distortionprobing reference signal.
 3. The apparatus of claim 1, wherein theinstructions are further executable by the processor to cause theapparatus to: receive an indication of a waveform type for thedistortion probing reference signal, wherein the configuration for thedistortion probing reference signal is based at least in part on thewaveform type.
 4. The apparatus of claim 3, wherein the indication ofthe waveform type is received in a system information message, a mediumaccess control channel element, a downlink control information message,a radio resource control message, a random access channel message, orany combination thereof.
 5. The apparatus of claim 1, wherein theinstructions are further executable by the processor to cause theapparatus to: select a waveform type for the distortion probingreference signal, wherein the configuration for the distortion probingreference signal is based at least in part on the waveform type; andindicate, to a receiving device, the waveform type selected by thetransmitting device.
 6. The apparatus of claim 5, wherein, to indicatethe waveform type, the instructions are further executable by theprocessor to cause the apparatus to: transmit an indication of thewaveform type in a system information message, a medium access controlchannel element, a downlink control information message, a radioresource control message, a random access channel message, an uplinkcontrol information message, or any combination thereof.
 7. Theapparatus of claim 1, wherein the instructions are further executable bythe processor to cause the apparatus to: determine a first waveform typefor signals transmitted using a data channel, a second waveform type forsignals transmitted using a control channel, or both, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the first waveform type or the second waveform type. 8.The apparatus of claim 1, wherein the instructions are furtherexecutable by the processor to cause the apparatus to: determine a firstnumerology for signals transmitted using a data channel in a bandwidthpart, a second numerology for signals transmitted using a controlchannel in the bandwidth part, a third numerology for reference signalstransmitted in the bandwidth part, or any combination thereof, whereinthe configuration for the distortion probing reference signal is basedat least in part on the first numerology, the second numerology, or thethird numerology.
 9. The apparatus of claim 1, wherein the instructionsare further executable by the processor to cause the apparatus to:activate a first bandwidth part and a second bandwidth part forcommunications; and determine a first numerology for signals transmittedusing a data channel in the first bandwidth part, a second numerologyfor signals transmitted using a control channel in the first bandwidthpart, a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof, wherein: the configurationfor the distortion probing reference signal is based at least in part onthe first numerology, the second numerology, or the third numerology,and the distortion probing reference signal is transmitted in the firstbandwidth part.
 10. The apparatus of claim 1, wherein the instructionsare further executable by the processor to cause the apparatus to:activate a first bandwidth part and a second bandwidth part forcommunications; determine a first numerology for signals transmittedusing a data channel in the first bandwidth part, a second numerologyfor signals transmitted using a control channel in the first bandwidthpart, a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof; and determine a fourthnumerology for signals transmitted using the data channel in the secondbandwidth part, a fifth numerology for signals transmitted using thecontrol channel in the second bandwidth part, a sixth numerology forreference signals transmitted in the second bandwidth part, or anycombination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, the third numerology, the fourthnumerology, the fifth numerology, or the sixth numerology, and whereinto transmit the distortion probing reference signal, the instructionsare further executable by the processor to cause the apparatus to:transmit a first component of the distortion probing reference signalbased at least in part on the first numerology, the second numerology,or the third numerology for transmission in the first bandwidth part;and transmit a second component of the distortion probing referencesignal based at least in part on the fourth numerology, the fifthnumerology, or the sixth numerology for transmission in the secondbandwidth part.
 11. The apparatus of claim 1, wherein the instructionsare further executable by the processor to cause the apparatus to:determine a synchronization signal block index configured for areceiving device, wherein the configuration for the distortion probingreference signal is based at least in part on the synchronization signalblock index and the distortion probing reference signal is transmittedusing a transmission spatial domain filter corresponding to thesynchronization signal block index.
 12. The apparatus of claim 1,wherein the instructions are further executable by the processor tocause the apparatus to: determine a first correspondence between acontrol channel and a first reference signal, a second correspondencebetween a data channel and a second reference signal, or both based atleast in part on a transmission configuration indicator.
 13. Theapparatus of claim 12, wherein the instructions are further executableby the processor to cause the apparatus to: indicate, to a receivingdevice, that the first reference signal corresponds to the distortionprobing reference signal based at least in part on the firstcorrespondence between the control channel and the first referencesignal; or indicate, to the receiving device, that the second referencesignal corresponds to the distortion probing reference signal based atleast in part on the second correspondence between the data channel andthe second reference signal.
 14. The apparatus of claim 12, wherein theinstructions are further executable by the processor to cause theapparatus to: indicate, to a receiving device, a third correspondencebetween the distortion probing reference signal and a third referencesignal.
 15. The apparatus of claim 1, wherein the instructions arefurther executable by the processor to cause the apparatus to: determinea first set of spatial filtering coefficients for signals transmittedusing a data channel, a second set of spatial filtering coefficients forsignals transmitted using a control channel, or both, wherein theconfiguration for the distortion probing reference signal is based atleast in part on the first set of spatial filtering coefficients or thesecond set of spatial filtering coefficients.
 16. The apparatus of claim1, wherein the instructions are further executable by the processor tocause the apparatus to: determine a set of one or more spatial filteringcoefficients for signals transmitted using a random access channel,wherein the configuration for the distortion probing reference signal isbased at least in part on the set of one or more spatial filteringcoefficients.
 17. The apparatus of claim 1, wherein the instructions arefurther executable by the processor to cause the apparatus to: receivean indication of a set of one or more spatial filtering coefficients forthe distortion probing reference signal, wherein the configuration forthe distortion probing reference signal is based at least in part on theset of one or more spatial filtering coefficients.
 18. A method forwireless communication, at a transmitting device, comprising:determining a configuration for a distortion probing reference signal;generating, based at least in part on the configuration, the distortionprobing reference signal using a sequence associated with apeak-to-average power ratio, wherein a transmission component at thetransmitting device operates in a non-linear operating region based atleast in part on the peak-to-average power ratio; and transmitting thegenerated distortion probing reference signal, the distortion probingreference signal associated with the peak-to-average power ratio. 19.The method of claim 18, further comprising: determining a non-linearresponse of the transmission component based at least in part on thedistortion probing reference signal.
 20. The method of claim 18, furthercomprising: receiving an indication of a waveform type for thedistortion probing reference signal, wherein the configuration for thedistortion probing reference signal is based at least in part on thewaveform type.
 21. The method of claim 20, wherein the indication of thewaveform type is received in a system information message, a mediumaccess control channel element, a downlink control information message,a radio resource control message, a random access channel message, orany combination thereof.
 22. The method of claim 18, further comprising:selecting a waveform type for the distortion probing reference signal,wherein the configuration for the distortion probing reference signal isbased at least in part on the waveform type; and indicating, to areceiving device, the waveform type selected by the transmitting device.23. The method of claim 22, wherein indicating the waveform type furthercomprises: transmitting an indication of the waveform type in a systeminformation message, a medium access control channel element, a downlinkcontrol information message, a radio resource control message, a randomaccess channel message, an uplink control information message, or anycombination thereof.
 24. The method of claim 18, further comprising:determining a first waveform type for signals transmitted using a datachannel, a second waveform type for signals transmitted using a controlchannel, or both, wherein the configuration for the distortion probingreference signal is based at least in part on the first waveform type orthe second waveform type.
 25. The method of claim 18, furthercomprising: determining a first numerology for signals transmitted usinga data channel in a bandwidth part, a second numerology for signalstransmitted using a control channel in the bandwidth part, a thirdnumerology for reference signals transmitted in the bandwidth part, orany combination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, or the third numerology.
 26. Themethod of claim 18, further comprising: activating a first bandwidthpart and a second bandwidth part for communications; and determining afirst numerology for signals transmitted using a data channel in thefirst bandwidth part, a second numerology for signals transmitted usinga control channel in the first bandwidth part, a third numerology forreference signals transmitted in the first bandwidth part, or anycombination thereof, wherein: the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, or the third numerology, and thedistortion probing reference signal is transmitted in the firstbandwidth part.
 27. The method of claim 18, further comprising:activating a first bandwidth part and a second bandwidth part forcommunications; determining a first numerology for signals transmittedusing a data channel in the first bandwidth part, a second numerologyfor signals transmitted using a control channel in the first bandwidthpart, a third numerology for reference signals transmitted in the firstbandwidth part, or any combination thereof; and determining a fourthnumerology for signals transmitted using the data channel in the secondbandwidth part, a fifth numerology for signals transmitted using thecontrol channel in the second bandwidth part, a sixth numerology forreference signals transmitted in the second bandwidth part, or anycombination thereof, wherein the configuration for the distortionprobing reference signal is based at least in part on the firstnumerology, the second numerology, the third numerology, the fourthnumerology, the fifth numerology, or the sixth numerology, and whereintransmitting the distortion probing reference signal further comprises:transmitting a first component of the distortion probing referencesignal based at least in part on the first numerology, the secondnumerology, or the third numerology for transmission in the firstbandwidth part; and transmitting a second component of the distortionprobing reference signal based at least in part on the fourthnumerology, the fifth numerology, or the sixth numerology fortransmission in the second bandwidth part.
 28. The method of claim 18,further comprising: determining a synchronization signal block indexconfigured for a receiving device, wherein the configuration for thedistortion probing reference signal is based at least in part on thesynchronization signal block index and the distortion probing referencesignal is transmitted using a transmission spatial domain filtercorresponding to the synchronization signal block index.
 29. Anapparatus for wireless communication at a transmitting device,comprising: means for determining a configuration for a distortionprobing reference signal; means for generating, based at least in parton the configuration, the distortion probing reference signal using asequence associated with a peak-to-average power ratio, wherein atransmission component at the transmitting device operates in anon-linear operating region based at least in part on thepeak-to-average power ratio; and means for transmitting the generateddistortion probing reference signal, the distortion probing referencesignal associated with the peak-to-average power ratio.
 30. Anon-transitory computer-readable medium storing code for wirelesscommunication at a transmitting device, the code comprising instructionsexecutable by a processor to: determine a configuration for a distortionprobing reference signal; generate, based at least in part on theconfiguration, the distortion probing reference signal using a sequenceassociated with a peak-to-average power ratio, wherein a transmissioncomponent at the transmitting device operates in a non-linear operatingregion based at least in part on the peak-to-average power ratio; andtransmit the generated distortion probing reference signal, thedistortion probing reference signal associated with the peak-to-averagepower ratio.